857945079 has 24 divisors (see below), whose sum is σ = 1267486272. Its totient is φ = 559016640.

The previous prime is 857945063. The next prime is 857945083. The reversal of 857945079 is 970549758.

It is not a de Polignac number, because 857945079 - 2⁴ = 857945063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857945009) 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, 125949 + ... + 132585.

It is an arithmetic number, because the mean of its divisors is an integer number (52811928).

Almost surely, 2^857945079 is an apocalyptic number.

857945079 is a deficient number, since it is larger than the sum of its proper divisors (409541193).

857945079 is a wasteful number, since it uses less digits than its factorization.

857945079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6967 (or 6964 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 857945079 is about 29290.6995307384. The cubic root of 857945079 is about 950.2105088443.

The spelling of 857945079 in words is "eight hundred fifty-seven million, nine hundred forty-five thousand, seventy-nine".