720730975 has 12 divisors (see below), whose sum is σ = 898877736. Its totient is φ = 573248480.

The previous prime is 720730943. The next prime is 720730979. The reversal of 720730975 is 579037027.

It is not a de Polignac number, because 720730975 - 2⁵ = 720730943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720730979) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78997 + ... + 87646.

It is an arithmetic number, because the mean of its divisors is an integer number (74906478).

Almost surely, 2^720730975 is an apocalyptic number.

720730975 is a deficient number, since it is larger than the sum of its proper divisors (178146761).

720730975 is a wasteful number, since it uses less digits than its factorization.

720730975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166826 (or 166821 counting only the distinct ones).

The product of its (nonzero) digits is 92610, while the sum is 40.

The square root of 720730975 is about 26846.4331895319. The cubic root of 720730975 is about 896.5841610599.

The spelling of 720730975 in words is "seven hundred twenty million, seven hundred thirty thousand, nine hundred seventy-five".