720320003 has 16 divisors (see below), whose sum is σ = 811218240. Its totient is φ = 634617984.

The previous prime is 720319889. The next prime is 720320023. The reversal of 720320003 is 300023027.

It is not a de Polignac number, because 720320003 - 2²⁴ = 703542787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (720320023) 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, 149825 + ... + 154557.

It is an arithmetic number, because the mean of its divisors is an integer number (50701140).

Almost surely, 2^720320003 is an apocalyptic number.

720320003 is a deficient number, since it is larger than the sum of its proper divisors (90898237).

720320003 is a wasteful number, since it uses less digits than its factorization.

720320003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5278.

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 720320003 is about 26838.7779714353. Note that the first 3 decimals coincide. The cubic root of 720320003 is about 896.4137132522.

The spelling of 720320003 in words is "seven hundred twenty million, three hundred twenty thousand, three".