720731263 has 18 divisors (see below), whose sum is σ = 841182264. Its totient is φ = 604923552.

The previous prime is 720731257. The next prime is 720731281. The reversal of 720731263 is 362137027.

It is a de Polignac number, because none of the positive numbers 2^k-720731263 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 (720731203) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5185048 + ... + 5185186.

It is an arithmetic number, because the mean of its divisors is an integer number (46732348).

Almost surely, 2^720731263 is an apocalyptic number.

720731263 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

720731263 is a deficient number, since it is larger than the sum of its proper divisors (120451001).

720731263 is an frugal number, since it uses more digits than its factorization.

720731263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431 (or 219 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 31.

The square root of 720731263 is about 26846.4385533724. The cubic root of 720731263 is about 896.5842804832.

The spelling of 720731263 in words is "seven hundred twenty million, seven hundred thirty-one thousand, two hundred sixty-three".