12597909 has 4 divisors (see below), whose sum is σ = 16797216. Its totient is φ = 8398604.

The previous prime is 12597899. The next prime is 12597911. The reversal of 12597909 is 90979521.

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: 90979521 = 3 ⋅30326507.

It is a cyclic number.

It is not a de Polignac number, because 12597909 - 2⁸ = 12597653 is a prime.

It is a super-2 number, since 2×12597909² = 317414622344562, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12595909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2099649 + ... + 2099654.

It is an arithmetic number, because the mean of its divisors is an integer number (4199304).

Almost surely, 2^12597909 is an apocalyptic number.

It is an amenable number.

12597909 is a deficient number, since it is larger than the sum of its proper divisors (4199307).

12597909 is an equidigital number, since it uses as much as digits as its factorization.

12597909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4199306.

The product of its (nonzero) digits is 51030, while the sum is 42.

The square root of 12597909 is about 3549.3533213812. The cubic root of 12597909 is about 232.6838042437.

The spelling of 12597909 in words is "twelve million, five hundred ninety-seven thousand, nine hundred nine".