869660957 has 12 divisors (see below), whose sum is σ = 964574208. Its totient is φ = 777603600.

The previous prime is 869660947. The next prime is 869660977. The reversal of 869660957 is 759066968.

It is a de Polignac number, because none of the positive numbers 2^k-869660957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869660917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30308 + ... + 51554.

It is an arithmetic number, because the mean of its divisors is an integer number (80381184).

Almost surely, 2^869660957 is an apocalyptic number.

It is an amenable number.

869660957 is a deficient number, since it is larger than the sum of its proper divisors (94913251).

869660957 is a wasteful number, since it uses less digits than its factorization.

869660957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21380 (or 21319 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 56.

The square root of 869660957 is about 29490.0145303457. The cubic root of 869660957 is about 954.5162455893.

The spelling of 869660957 in words is "eight hundred sixty-nine million, six hundred sixty thousand, nine hundred fifty-seven".