720927431 has 16 divisors (see below), whose sum is σ = 881990400. Its totient is φ = 575486208.

The previous prime is 720927391. The next prime is 720927439. The reversal of 720927431 is 134729027.

It is a cyclic number.

It is not a de Polignac number, because 720927431 - 2⁶ = 720927367 is a prime.

It is a super-2 number, since 2×720927431² = 1039472721536519522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 720927391 and 720927400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (720927439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38090 + ... + 53783.

It is an arithmetic number, because the mean of its divisors is an integer number (55124400).

Almost surely, 2^720927431 is an apocalyptic number.

720927431 is a deficient number, since it is larger than the sum of its proper divisors (161062969).

720927431 is a wasteful number, since it uses less digits than its factorization.

720927431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91958.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 720927431 is about 26850.0918247964. The cubic root of 720927431 is about 896.6656169441.

The spelling of 720927431 in words is "seven hundred twenty million, nine hundred twenty-seven thousand, four hundred thirty-one".