725320313 has 8 divisors (see below), whose sum is σ = 736537032. Its totient is φ = 714180096.

The previous prime is 725320273. The next prime is 725320357. The reversal of 725320313 is 313023527.

It can be written as a sum of positive squares in 4 ways, for example, as 88868329 + 636451984 = 9427^2 + 25228^2 .

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 725320313 - 2²⁴ = 708543097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (725325313) 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, 131 + ... + 38087.

It is an arithmetic number, because the mean of its divisors is an integer number (92067129).

Almost surely, 2^725320313 is an apocalyptic number.

It is an amenable number.

725320313 is a deficient number, since it is larger than the sum of its proper divisors (11216719).

725320313 is a wasteful number, since it uses less digits than its factorization.

725320313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38251.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 725320313 is about 26931.7714419234. The cubic root of 725320313 is about 898.4831705377.

The spelling of 725320313 in words is "seven hundred twenty-five million, three hundred twenty thousand, three hundred thirteen".