725312173 has 4 divisors (see below), whose sum is σ = 726207328. Its totient is φ = 724417020.

The previous prime is 725312149. The next prime is 725312197. The reversal of 725312173 is 371213527.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (725312149) and next prime (725312197).

It is a cyclic number.

It is not a de Polignac number, because 725312173 - 2⁵ = 725312141 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 (725312773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 446361 + ... + 447982.

It is an arithmetic number, because the mean of its divisors is an integer number (181551832).

Almost surely, 2^725312173 is an apocalyptic number.

It is an amenable number.

725312173 is a deficient number, since it is larger than the sum of its proper divisors (895155).

725312173 is an equidigital number, since it uses as much as digits as its factorization.

725312173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895154.

The product of its digits is 8820, while the sum is 31.

The square root of 725312173 is about 26931.6203188742. The cubic root of 725312173 is about 898.4798094110.

The spelling of 725312173 in words is "seven hundred twenty-five million, three hundred twelve thousand, one hundred seventy-three".