12697879 has 4 divisors (see below), whose sum is σ = 13107520. Its totient is φ = 12288240.

The previous prime is 12697859. The next prime is 12697901. The reversal of 12697879 is 97879621.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12697879 - 2⁵ = 12697847 is a prime.

It is a super-2 number, since 2×12697879² = 322472262197282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697829) 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, 204774 + ... + 204835.

It is an arithmetic number, because the mean of its divisors is an integer number (3276880).

Almost surely, 2^12697879 is an apocalyptic number.

12697879 is a deficient number, since it is larger than the sum of its proper divisors (409641).

12697879 is an equidigital number, since it uses as much as digits as its factorization.

12697879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409640.

The product of its digits is 381024, while the sum is 49.

The square root of 12697879 is about 3563.4083403393. The cubic root of 12697879 is about 233.2976664304.

The spelling of 12697879 in words is "twelve million, six hundred ninety-seven thousand, eight hundred seventy-nine".