720564431 has 8 divisors (see below), whose sum is σ = 774339120. Its totient is φ = 668055168.

The previous prime is 720564389. The next prime is 720564433. The reversal of 720564431 is 134465027.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 720564431 - 2¹⁴ = 720548047 is a prime.

It is a super-2 number, since 2×720564431² = 1038426198444707522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720564433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 315176 + ... + 317453.

It is an arithmetic number, because the mean of its divisors is an integer number (96792390).

Almost surely, 2^720564431 is an apocalyptic number.

720564431 is a deficient number, since it is larger than the sum of its proper divisors (53774689).

720564431 is a wasteful number, since it uses less digits than its factorization.

720564431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632713.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 720564431 is about 26843.3312202491. The cubic root of 720564431 is about 896.5150958929.

The spelling of 720564431 in words is "seven hundred twenty million, five hundred sixty-four thousand, four hundred thirty-one".