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12133613 = 13192623
BaseRepresentation
bin101110010010…
…010011101101
3211211110012002
4232102103231
511101233423
61112022045
7205063652
oct56222355
924743162
1012133613
116938188
124091925
13268aa6b
14187bc29
1510ea228
hexb924ed

12133613 has 4 divisors (see below), whose sum is σ = 12226368. Its totient is φ = 12040860.

The previous prime is 12133607. The next prime is 12133619. The reversal of 12133613 is 31633121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31633121 = 132433317.

It is an interprime number because it is at equal distance from previous prime (12133607) and next prime (12133619).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-12133613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46181 + ... + 46442.

It is an arithmetic number, because the mean of its divisors is an integer number (3056592).

Almost surely, 212133613 is an apocalyptic number.

It is an amenable number.

12133613 is a deficient number, since it is larger than the sum of its proper divisors (92755).

12133613 is an equidigital number, since it uses as much as digits as its factorization.

12133613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92754.

The product of its digits is 324, while the sum is 20.

The square root of 12133613 is about 3483.3336044657. Note that the first 3 decimals coincide. The cubic root of 12133613 is about 229.7894292041.

Adding to 12133613 its reverse (31633121), we get a palindrome (43766734).

The spelling of 12133613 in words is "twelve million, one hundred thirty-three thousand, six hundred thirteen".

Divisors: 1 131 92623 12133613