717846749 has 2 divisors, whose sum is σ = 717846750. Its totient is φ = 717846748.

The previous prime is 717846683. The next prime is 717846761. The reversal of 717846749 is 947648717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 485893849 + 231952900 = 22043^2 + 15230^2 .

It is a cyclic number.

It is not a de Polignac number, because 717846749 - 2¹⁶ = 717781213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 717846749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (717846769) 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, 358923374 + 358923375.

It is an arithmetic number, because the mean of its divisors is an integer number (358923375).

Almost surely, 2^717846749 is an apocalyptic number.

It is an amenable number.

717846749 is a deficient number, since it is larger than the sum of its proper divisors (1).

717846749 is an equidigital number, since it uses as much as digits as its factorization.

717846749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2370816, while the sum is 53.

The square root of 717846749 is about 26792.6622230789. The cubic root of 717846749 is about 895.3865766536.

The spelling of 717846749 in words is "seven hundred seventeen million, eight hundred forty-six thousand, seven hundred forty-nine".