[go: up one dir, main page]

Search a number
-
+
13308445 = 52661689
BaseRepresentation
bin110010110001…
…001000011101
3221001010202101
4302301020131
511401332240
61153125101
7221056063
oct62611035
927033671
1013308445
11756a917
124559791
1329ac727
141aa6033
15127d39a
hexcb121d

13308445 has 4 divisors (see below), whose sum is σ = 15970140. Its totient is φ = 10646752.

The previous prime is 13308443. The next prime is 13308479. The reversal of 13308445 is 54480331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54480331 = 70277753.

It can be written as a sum of positive squares in 2 ways, for example, as 5225796 + 8082649 = 2286^2 + 2843^2 .

It is a cyclic number.

It is not a de Polignac number, because 13308445 - 21 = 13308443 is a prime.

It is a super-2 number, since 2×133084452 = 354229416636050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13308443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330840 + ... + 1330849.

It is an arithmetic number, because the mean of its divisors is an integer number (3992535).

Almost surely, 213308445 is an apocalyptic number.

It is an amenable number.

13308445 is a deficient number, since it is larger than the sum of its proper divisors (2661695).

13308445 is an equidigital number, since it uses as much as digits as its factorization.

13308445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661694.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 13308445 is about 3648.0741494657. The cubic root of 13308445 is about 236.9785864919.

Adding to 13308445 its reverse (54480331), we get a palindrome (67788776).

The spelling of 13308445 in words is "thirteen million, three hundred eight thousand, four hundred forty-five".

Divisors: 1 5 2661689 13308445