857338831 has 2 divisors, whose sum is σ = 857338832. Its totient is φ = 857338830.

The previous prime is 857338817. The next prime is 857338837. The reversal of 857338831 is 138833758.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 857338831 - 2¹⁵ = 857306063 is a prime.

It is a super-2 number, since 2×857338831² = 1470059742280893122, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857338837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428669415 + 428669416.

It is an arithmetic number, because the mean of its divisors is an integer number (428669416).

Almost surely, 2^857338831 is an apocalyptic number.

857338831 is a deficient number, since it is larger than the sum of its proper divisors (1).

857338831 is an equidigital number, since it uses as much as digits as its factorization.

857338831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 46.

The square root of 857338831 is about 29280.3488879487. The cubic root of 857338831 is about 949.9866409940.

The spelling of 857338831 in words is "eight hundred fifty-seven million, three hundred thirty-eight thousand, eight hundred thirty-one".