12997232857 has 8 divisors (see below), whose sum is σ = 14861114496. Its totient is φ = 11135134752.

The previous prime is 12997232813. The next prime is 12997232879. The reversal of 12997232857 is 75823279921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-12997232857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12997232798 and 12997232807.

It is not an unprimeable number, because it can be changed into a prime (12997232957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430228 + ... + 459445.

It is an arithmetic number, because the mean of its divisors is an integer number (1857639312).

Almost surely, 2^12997232857 is an apocalyptic number.

It is an amenable number.

12997232857 is a deficient number, since it is larger than the sum of its proper divisors (1863881639).

12997232857 is an equidigital number, since it uses as much as digits as its factorization.

12997232857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891767.

The product of its digits is 3810240, while the sum is 55.

The spelling of 12997232857 in words is "twelve billion, nine hundred ninety-seven million, two hundred thirty-two thousand, eight hundred fifty-seven".