857045831 has 2 divisors, whose sum is σ = 857045832. Its totient is φ = 857045830.

The previous prime is 857045821. The next prime is 857045851. The reversal of 857045831 is 138540758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857045831 - 2⁶ = 857045767 is a prime.

It is a super-2 number, since 2×857045831² = 1469055112868961122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857045801) 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 as a sum of consecutive naturals, namely, 428522915 + 428522916.

It is an arithmetic number, because the mean of its divisors is an integer number (428522916).

Almost surely, 2^857045831 is an apocalyptic number.

857045831 is a deficient number, since it is larger than the sum of its proper divisors (1).

857045831 is an equidigital number, since it uses as much as digits as its factorization.

857045831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 857045831 is about 29275.3451047123. The cubic root of 857045831 is about 949.8784077065.

The spelling of 857045831 in words is "eight hundred fifty-seven million, forty-five thousand, eight hundred thirty-one".