717312920 has 16 divisors (see below), whose sum is σ = 1613954160. Its totient is φ = 286925152.

The previous prime is 717312907. The next prime is 717312923. The reversal of 717312920 is 29213717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (717312923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8966372 + ... + 8966451.

It is an arithmetic number, because the mean of its divisors is an integer number (100872135).

Almost surely, 2^717312920 is an apocalyptic number.

It is an amenable number.

717312920 is an abundant number, since it is smaller than the sum of its proper divisors (896641240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

717312920 is a wasteful number, since it uses less digits than its factorization.

717312920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17932834 (or 17932830 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 717312920 is about 26782.6981463780. The cubic root of 717312920 is about 895.1645692613.

The spelling of 717312920 in words is "seven hundred seventeen million, three hundred twelve thousand, nine hundred twenty".