992785531 has 2 divisors, whose sum is σ = 992785532. Its totient is φ = 992785530.

The previous prime is 992785489. The next prime is 992785561. The reversal of 992785531 is 135587299.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 992785531 - 2⁹ = 992785019 is a prime.

It is a super-2 number, since 2×992785531² = 1971246221125903922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (992785561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496392765 + 496392766.

It is an arithmetic number, because the mean of its divisors is an integer number (496392766).

Almost surely, 2^992785531 is an apocalyptic number.

992785531 is a deficient number, since it is larger than the sum of its proper divisors (1).

992785531 is an equidigital number, since it uses as much as digits as its factorization.

992785531 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 49.

The square root of 992785531 is about 31508.4993454147. The cubic root of 992785531 is about 997.5893705351.

The spelling of 992785531 in words is "nine hundred ninety-two million, seven hundred eighty-five thousand, five hundred thirty-one".