399233299931 has 2 divisors, whose sum is σ = 399233299932. Its totient is φ = 399233299930.

The previous prime is 399233299909. The next prime is 399233299939. The reversal of 399233299931 is 139992332993.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399233299931 is a prime.

It is a super-2 number, since 2×399233299931² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (399233299939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199616649965 + 199616649966.

It is an arithmetic number, because the mean of its divisors is an integer number (199616649966).

Almost surely, 2^399233299931 is an apocalyptic number.

399233299931 is a deficient number, since it is larger than the sum of its proper divisors (1).

399233299931 is an equidigital number, since it uses as much as digits as its factorization.

399233299931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19131876, while the sum is 62.

The spelling of 399233299931 in words is "three hundred ninety-nine billion, two hundred thirty-three million, two hundred ninety-nine thousand, nine hundred thirty-one".