992639831 has 2 divisors, whose sum is σ = 992639832. Its totient is φ = 992639830.

The previous prime is 992639801. The next prime is 992639899. The reversal of 992639831 is 138936299.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 992639831 - 2²² = 988445527 is a prime.

It is a super-2 number, since 2×992639831² = 1970667668175417122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 992639831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (992639801) 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, 496319915 + 496319916.

It is an arithmetic number, because the mean of its divisors is an integer number (496319916).

Almost surely, 2^992639831 is an apocalyptic number.

992639831 is a deficient number, since it is larger than the sum of its proper divisors (1).

992639831 is an equidigital number, since it uses as much as digits as its factorization.

992639831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 629856, while the sum is 50.

The square root of 992639831 is about 31506.1871860116. The cubic root of 992639831 is about 997.5405664790.

The spelling of 992639831 in words is "nine hundred ninety-two million, six hundred thirty-nine thousand, eight hundred thirty-one".