715657 has 2 divisors, whose sum is σ = 715658. Its totient is φ = 715656.

The previous prime is 715651. The next prime is 715679. The reversal of 715657 is 756517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 674041 + 41616 = 821^2 + 204^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-715657 is a prime.

It is not a weakly prime, because it can be changed into another prime (715651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 357828 + 357829.

It is an arithmetic number, because the mean of its divisors is an integer number (357829).

2⁷¹⁵⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

715657 is a deficient number, since it is larger than the sum of its proper divisors (1).

715657 is an equidigital number, since it uses as much as digits as its factorization.

715657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7350, while the sum is 31.

The square root of 715657 is about 845.9651293050. The cubic root of 715657 is about 89.4475208089.

The spelling of 715657 in words is "seven hundred fifteen thousand, six hundred fifty-seven".