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30819669 = 310273223
BaseRepresentation
bin111010110010…
…0010101010101
32010222210122020
41311210111111
530342212134
63020323353
7522651156
oct165442525
963883566
1030819669
1116440301
12a3a3559
1365010ba
14414392d
152a8bb49
hex1d64555

30819669 has 4 divisors (see below), whose sum is σ = 41092896. Its totient is φ = 20546444.

The previous prime is 30819667. The next prime is 30819671. The reversal of 30819669 is 96691803.

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.

It is an interprime number because it is at equal distance from previous prime (30819667) and next prime (30819671).

It is a cyclic number.

It is not a de Polignac number, because 30819669 - 21 = 30819667 is a prime.

It is a super-2 number, since 2×308196692 = 1899703994539122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 30819669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30819667) 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, 5136609 + ... + 5136614.

It is an arithmetic number, because the mean of its divisors is an integer number (10273224).

Almost surely, 230819669 is an apocalyptic number.

It is an amenable number.

30819669 is a deficient number, since it is larger than the sum of its proper divisors (10273227).

30819669 is a wasteful number, since it uses less digits than its factorization.

30819669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10273226.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 30819669 is about 5551.5465412802. The cubic root of 30819669 is about 313.5277530635.

The spelling of 30819669 in words is "thirty million, eight hundred nineteen thousand, six hundred sixty-nine".

Divisors: 1 3 10273223 30819669