716375021 has 2 divisors, whose sum is σ = 716375022. Its totient is φ = 716375020.

The previous prime is 716375017. The next prime is 716375027. The reversal of 716375021 is 120573617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529506121 + 186868900 = 23011^2 + 13670^2 .

It is an emirp because it is prime and its reverse (120573617) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 716375021 - 2² = 716375017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (716375027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358187510 + 358187511.

It is an arithmetic number, because the mean of its divisors is an integer number (358187511).

Almost surely, 2^716375021 is an apocalyptic number.

It is an amenable number.

716375021 is a deficient number, since it is larger than the sum of its proper divisors (1).

716375021 is an equidigital number, since it uses as much as digits as its factorization.

716375021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 716375021 is about 26765.1829995612. The cubic root of 716375021 is about 894.7742513976.

The spelling of 716375021 in words is "seven hundred sixteen million, three hundred seventy-five thousand, twenty-one".