716685917 has 2 divisors, whose sum is σ = 716685918. Its totient is φ = 716685916.

The previous prime is 716685899. The next prime is 716685929. The reversal of 716685917 is 719586617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544708921 + 171976996 = 23339^2 + 13114^2 .

It is a cyclic number.

It is not a de Polignac number, because 716685917 - 2¹⁰ = 716684893 is a prime.

It is a super-2 number, since 2×716685917² = 1027277407252261778, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716685017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358342958 + 358342959.

It is an arithmetic number, because the mean of its divisors is an integer number (358342959).

Almost surely, 2^716685917 is an apocalyptic number.

It is an amenable number.

716685917 is a deficient number, since it is larger than the sum of its proper divisors (1).

716685917 is an equidigital number, since it uses as much as digits as its factorization.

716685917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 50.

The square root of 716685917 is about 26770.9902132887. The cubic root of 716685917 is about 894.9036722061.

The spelling of 716685917 in words is "seven hundred sixteen million, six hundred eighty-five thousand, nine hundred seventeen".