716573981 has 2 divisors, whose sum is σ = 716573982. Its totient is φ = 716573980.

The previous prime is 716573969. The next prime is 716573983. The reversal of 716573981 is 189375617.

716573981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674440900 + 42133081 = 25970^2 + 6491^2 .

It is an emirp because it is prime and its reverse (189375617) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-716573981 is a prime.

It is a super-2 number, since 2×716573981² = 1026956540492376722, which contains 22 as substring.

Together with 716573983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716573983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358286990 + 358286991.

It is an arithmetic number, because the mean of its divisors is an integer number (358286991).

Almost surely, 2^716573981 is an apocalyptic number.

It is an amenable number.

716573981 is a deficient number, since it is larger than the sum of its proper divisors (1).

716573981 is an equidigital number, since it uses as much as digits as its factorization.

716573981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 47.

The square root of 716573981 is about 26768.8995104393. The cubic root of 716573981 is about 894.8570794329.

The spelling of 716573981 in words is "seven hundred sixteen million, five hundred seventy-three thousand, nine hundred eighty-one".