398882185831 has 2 divisors, whose sum is σ = 398882185832. Its totient is φ = 398882185830.

The previous prime is 398882185787. The next prime is 398882185853. The reversal of 398882185831 is 138581288893.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398882185831 - 2⁷ = 398882185703 is a prime.

It is a super-2 number, since 2×398882185831² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398882185231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199441092915 + 199441092916.

It is an arithmetic number, because the mean of its divisors is an integer number (199441092916).

Almost surely, 2^398882185831 is an apocalyptic number.

398882185831 is a deficient number, since it is larger than the sum of its proper divisors (1).

398882185831 is an equidigital number, since it uses as much as digits as its factorization.

398882185831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26542080, while the sum is 64.

The spelling of 398882185831 in words is "three hundred ninety-eight billion, eight hundred eighty-two million, one hundred eighty-five thousand, eight hundred thirty-one".