725323391 has 8 divisors (see below), whose sum is σ = 795856320. Its totient is φ = 656896032.

The previous prime is 725323381. The next prime is 725323393. The reversal of 725323391 is 193323527.

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

It is a de Polignac number, because none of the positive numbers 2^k-725323391 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 (725323393) 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, 525671 + ... + 527048.

It is an arithmetic number, because the mean of its divisors is an integer number (99482040).

Almost surely, 2^725323391 is an apocalyptic number.

725323391 is a deficient number, since it is larger than the sum of its proper divisors (70532929).

725323391 is a wasteful number, since it uses less digits than its factorization.

725323391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1052785.

The product of its digits is 34020, while the sum is 35.

The square root of 725323391 is about 26931.8285862657. The cubic root of 725323391 is about 898.4844414829.

The spelling of 725323391 in words is "seven hundred twenty-five million, three hundred twenty-three thousand, three hundred ninety-one".