871900857 has 12 divisors (see below), whose sum is σ = 1259692720. Its totient is φ = 581137848.

The previous prime is 871900837. The next prime is 871900867. The reversal of 871900857 is 758009178.

It is not a de Polignac number, because 871900857 - 2¹² = 871896761 is a prime.

It is a super-2 number, since 2×871900857² = 1520422208874668898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (871900817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49818 + ... + 65004.

Almost surely, 2^871900857 is an apocalyptic number.

It is an amenable number.

871900857 is a deficient number, since it is larger than the sum of its proper divisors (387791863).

871900857 is a wasteful number, since it uses less digits than its factorization.

871900857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21572 (or 21569 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 871900857 is about 29527.9673699359. The cubic root of 871900857 is about 955.3350275065.

The spelling of 871900857 in words is "eight hundred seventy-one million, nine hundred thousand, eight hundred fifty-seven".