717656449 has 2 divisors, whose sum is σ = 717656450. Its totient is φ = 717656448.

The previous prime is 717656339. The next prime is 717656453. The reversal of 717656449 is 944656717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 484880400 + 232776049 = 22020^2 + 15257^2 .

It is a cyclic number.

It is not a de Polignac number, because 717656449 - 2⁷ = 717656321 is a prime.

It is not a weakly prime, because it can be changed into another prime (717656249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 358828224 + 358828225.

It is an arithmetic number, because the mean of its divisors is an integer number (358828225).

Almost surely, 2^717656449 is an apocalyptic number.

It is an amenable number.

717656449 is a deficient number, since it is larger than the sum of its proper divisors (1).

717656449 is an equidigital number, since it uses as much as digits as its factorization.

717656449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 49.

The square root of 717656449 is about 26789.1106421994. The cubic root of 717656449 is about 895.3074478215.

The spelling of 717656449 in words is "seven hundred seventeen million, six hundred fifty-six thousand, four hundred forty-nine".