12813569 has 2 divisors, whose sum is σ = 12813570. Its totient is φ = 12813568.

The previous prime is 12813557. The next prime is 12813587. The reversal of 12813569 is 96531821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7907344 + 4906225 = 2812^2 + 2215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12813569 is a prime.

It is a super-2 number, since 2×12813569² = 328375101035522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12813589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6406784 + 6406785.

It is an arithmetic number, because the mean of its divisors is an integer number (6406785).

Almost surely, 2^12813569 is an apocalyptic number.

It is an amenable number.

12813569 is a deficient number, since it is larger than the sum of its proper divisors (1).

12813569 is an equidigital number, since it uses as much as digits as its factorization.

12813569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 12813569 is about 3579.6045871018. The cubic root of 12813569 is about 234.0040481926.

The spelling of 12813569 in words is "twelve million, eight hundred thirteen thousand, five hundred sixty-nine".