717116881 has 4 divisors (see below), whose sum is σ = 772279732. Its totient is φ = 661954032.

The previous prime is 717116861. The next prime is 717116923. The reversal of 717116881 is 188611717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 324720400 + 392396481 = 18020^2 + 19809^2 .

It is a cyclic number.

It is not a de Polignac number, because 717116881 - 2⁵ = 717116849 is a prime.

It is a super-2 number, since 2×717116881² = 1028513242030336322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (717116821) 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 in 3 ways as a sum of consecutive naturals, for example, 27581406 + ... + 27581431.

It is an arithmetic number, because the mean of its divisors is an integer number (193069933).

Almost surely, 2^717116881 is an apocalyptic number.

It is an amenable number.

717116881 is a deficient number, since it is larger than the sum of its proper divisors (55162851).

717116881 is a wasteful number, since it uses less digits than its factorization.

717116881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55162850.

The product of its digits is 18816, while the sum is 40.

The square root of 717116881 is about 26779.0380895207. The cubic root of 717116881 is about 895.0830134292.

The spelling of 717116881 in words is "seven hundred seventeen million, one hundred sixteen thousand, eight hundred eighty-one".