869172513 has 32 divisors (see below), whose sum is σ = 1340362752. Its totient is φ = 495979200.

The previous prime is 869172509. The next prime is 869172527. The reversal of 869172513 is 315271968.

It is not a de Polignac number, because 869172513 - 2² = 869172509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (869172503) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 26370 + ... + 49332.

It is an arithmetic number, because the mean of its divisors is an integer number (41886336).

Almost surely, 2^869172513 is an apocalyptic number.

It is an amenable number.

869172513 is a deficient number, since it is larger than the sum of its proper divisors (471190239).

869172513 is a wasteful number, since it uses less digits than its factorization.

869172513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23045.

The product of its digits is 90720, while the sum is 42.

The square root of 869172513 is about 29481.7318521148. The cubic root of 869172513 is about 954.3375111672.

The spelling of 869172513 in words is "eight hundred sixty-nine million, one hundred seventy-two thousand, five hundred thirteen".