717660539 has 2 divisors, whose sum is σ = 717660540. Its totient is φ = 717660538.

The previous prime is 717660511. The next prime is 717660557. The reversal of 717660539 is 935066717.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 717660539 - 2¹⁶ = 717595003 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 717660539.

It is not a weakly prime, because it can be changed into another prime (717660589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358830269 + 358830270.

It is an arithmetic number, because the mean of its divisors is an integer number (358830270).

Almost surely, 2^717660539 is an apocalyptic number.

717660539 is a deficient number, since it is larger than the sum of its proper divisors (1).

717660539 is an equidigital number, since it uses as much as digits as its factorization.

717660539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 238140, while the sum is 44.

The square root of 717660539 is about 26789.1869790780. The cubic root of 717660539 is about 895.3091486355.

The spelling of 717660539 in words is "seven hundred seventeen million, six hundred sixty thousand, five hundred thirty-nine".