857071089 has 24 divisors (see below), whose sum is σ = 1416455040. Its totient is φ = 489198528.

The previous prime is 857071087. The next prime is 857071091. The reversal of 857071089 is 980170758.

857071089 is a `hidden beast` number, since 8 + 570 + 71 + 0 + 8 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (857071087) and next prime (857071091).

It is not a de Polignac number, because 857071089 - 2¹ = 857071087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857071087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51772 + ... + 66290.

It is an arithmetic number, because the mean of its divisors is an integer number (59018960).

Almost surely, 2^857071089 is an apocalyptic number.

It is an amenable number.

857071089 is a deficient number, since it is larger than the sum of its proper divisors (559383951).

857071089 is a wasteful number, since it uses less digits than its factorization.

857071089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15469 (or 15466 counting only the distinct ones).

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

The square root of 857071089 is about 29275.7764884213. The cubic root of 857071089 is about 949.8877389046.

The spelling of 857071089 in words is "eight hundred fifty-seven million, seventy-one thousand, eighty-nine".