715057991 has 2 divisors, whose sum is σ = 715057992. Its totient is φ = 715057990.

The previous prime is 715057979. The next prime is 715058023. The reversal of 715057991 is 199750517.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 715057991 - 2¹⁰ = 715056967 is a prime.

It is a super-2 number, since 2×715057991² = 1022615860985912162, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (715057591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357528995 + 357528996.

It is an arithmetic number, because the mean of its divisors is an integer number (357528996).

Almost surely, 2^715057991 is an apocalyptic number.

715057991 is a deficient number, since it is larger than the sum of its proper divisors (1).

715057991 is an equidigital number, since it uses as much as digits as its factorization.

715057991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 99225, while the sum is 44.

The square root of 715057991 is about 26740.5682624734. The cubic root of 715057991 is about 894.2255781411.

The spelling of 715057991 in words is "seven hundred fifteen million, fifty-seven thousand, nine hundred ninety-one".