720331273 has 8 divisors (see below), whose sum is σ = 752169600. Its totient is φ = 688536288.

The previous prime is 720331267. The next prime is 720331277. The reversal of 720331273 is 372133027.

720331273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-720331273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720331277) 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, 25813 + ... + 45901.

It is an arithmetic number, because the mean of its divisors is an integer number (94021200).

Almost surely, 2^720331273 is an apocalyptic number.

It is an amenable number.

720331273 is a deficient number, since it is larger than the sum of its proper divisors (31838327).

720331273 is a wasteful number, since it uses less digits than its factorization.

720331273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21671.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 720331273 is about 26838.9879280125. The cubic root of 720331273 is about 896.4183882715.

The spelling of 720331273 in words is "seven hundred twenty million, three hundred thirty-one thousand, two hundred seventy-three".