916398631 has 2 divisors, whose sum is σ = 916398632. Its totient is φ = 916398630.

The previous prime is 916398629. The next prime is 916398661. The reversal of 916398631 is 136893619.

It is a weak prime.

It is an emirp because it is prime and its reverse (136893619) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 916398631 - 2¹ = 916398629 is a prime.

It is a super-2 number, since 2×916398631² = 1679572901797348322, which contains 22 as substring.

Together with 916398629, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (916398661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458199315 + 458199316.

It is an arithmetic number, because the mean of its divisors is an integer number (458199316).

Almost surely, 2^916398631 is an apocalyptic number.

916398631 is a deficient number, since it is larger than the sum of its proper divisors (1).

916398631 is an equidigital number, since it uses as much as digits as its factorization.

916398631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 916398631 is about 30272.0767539989. The cubic root of 916398631 is about 971.3180901222.

The spelling of 916398631 in words is "nine hundred sixteen million, three hundred ninety-eight thousand, six hundred thirty-one".