716687957 has 2 divisors, whose sum is σ = 716687958. Its totient is φ = 716687956.

The previous prime is 716687947. The next prime is 716688019. The reversal of 716687957 is 759786617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 490666801 + 226021156 = 22151^2 + 15034^2 .

It is an emirp because it is prime and its reverse (759786617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 716687957 - 2⁴ = 716687941 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716687947) 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, 358343978 + 358343979.

It is an arithmetic number, because the mean of its divisors is an integer number (358343979).

Almost surely, 2^716687957 is an apocalyptic number.

It is an amenable number.

716687957 is a deficient number, since it is larger than the sum of its proper divisors (1).

716687957 is an equidigital number, since it uses as much as digits as its factorization.

716687957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4445280, while the sum is 56.

The square root of 716687957 is about 26771.0283142056. The cubic root of 716687957 is about 894.9045213004.

The spelling of 716687957 in words is "seven hundred sixteen million, six hundred eighty-seven thousand, nine hundred fifty-seven".