869892987 has 16 divisors (see below), whose sum is σ = 1173553920. Its totient is φ = 573107232.

The previous prime is 869892971. The next prime is 869893091. The reversal of 869892987 is 789298968.

It is not a de Polignac number, because 869892987 - 2⁴ = 869892971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (869892187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 137833 + ... + 144005.

It is an arithmetic number, because the mean of its divisors is an integer number (73347120).

Almost surely, 2^869892987 is an apocalyptic number.

869892987 is a deficient number, since it is larger than the sum of its proper divisors (303660933).

869892987 is a wasteful number, since it uses less digits than its factorization.

869892987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6722.

The product of its digits is 31352832, while the sum is 66.

The square root of 869892987 is about 29493.9483114757. The cubic root of 869892987 is about 954.6011279827.

The spelling of 869892987 in words is "eight hundred sixty-nine million, eight hundred ninety-two thousand, nine hundred eighty-seven".