716820977 has 2 divisors, whose sum is σ = 716820978. Its totient is φ = 716820976.

The previous prime is 716820889. The next prime is 716821033. The reversal of 716820977 is 779028617.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613107121 + 103713856 = 24761^2 + 10184^2 .

It is an emirp because it is prime and its reverse (779028617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 716820977 - 2¹⁰ = 716819953 is a prime.

It is not a weakly prime, because it can be changed into another prime (716826977) 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, 358410488 + 358410489.

It is an arithmetic number, because the mean of its divisors is an integer number (358410489).

Almost surely, 2^716820977 is an apocalyptic number.

It is an amenable number.

716820977 is a deficient number, since it is larger than the sum of its proper divisors (1).

716820977 is an equidigital number, since it uses as much as digits as its factorization.

716820977 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 296352, while the sum is 47.

The square root of 716820977 is about 26773.5126010765. The cubic root of 716820977 is about 894.9598837652.

The spelling of 716820977 in words is "seven hundred sixteen million, eight hundred twenty thousand, nine hundred seventy-seven".