716579991 has 12 divisors (see below), whose sum is σ = 1035292440. Its totient is φ = 477612720.

The previous prime is 716579989. The next prime is 716580023. The reversal of 716579991 is 199975617.

It is a happy number.

716579991 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 716579991 - 2¹ = 716579989 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (716579491) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70756 + ... + 80246.

It is an arithmetic number, because the mean of its divisors is an integer number (86274370).

Almost surely, 2^716579991 is an apocalyptic number.

716579991 is a deficient number, since it is larger than the sum of its proper divisors (318712449).

716579991 is a wasteful number, since it uses less digits than its factorization.

716579991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17886 (or 17883 counting only the distinct ones).

The product of its digits is 1071630, while the sum is 54.

The square root of 716579991 is about 26769.0117673402. The cubic root of 716579991 is about 894.8595811872.

The spelling of 716579991 in words is "seven hundred sixteen million, five hundred seventy-nine thousand, nine hundred ninety-one".