857376931 has 2 divisors, whose sum is σ = 857376932. Its totient is φ = 857376930.

The previous prime is 857376869. The next prime is 857377009. The reversal of 857376931 is 139673758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857376931 - 2²¹ = 855279779 is a prime.

It is a super-2 number, since 2×857376931² = 1470190403621957522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (857376031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428688465 + 428688466.

It is an arithmetic number, because the mean of its divisors is an integer number (428688466).

Almost surely, 2^857376931 is an apocalyptic number.

857376931 is a deficient number, since it is larger than the sum of its proper divisors (1).

857376931 is an equidigital number, since it uses as much as digits as its factorization.

857376931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 49.

The square root of 857376931 is about 29280.9994877224. Note that the first 3 decimals coincide. The cubic root of 857376931 is about 950.0007132035. Note that the first 3 decimals are identical.

The spelling of 857376931 in words is "eight hundred fifty-seven million, three hundred seventy-six thousand, nine hundred thirty-one".