725311173 has 4 divisors (see below), whose sum is σ = 967081568. Its totient is φ = 483540780.

The previous prime is 725311151. The next prime is 725311189. The reversal of 725311173 is 371113527.

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, and also an emirpimes, since its reverse is a distinct semiprime: 371113527 = 3 ⋅123704509.

It is not a de Polignac number, because 725311173 - 2⁸ = 725310917 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725311173.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725311133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120885193 + ... + 120885198.

It is an arithmetic number, because the mean of its divisors is an integer number (241770392).

Almost surely, 2^725311173 is an apocalyptic number.

It is an amenable number.

725311173 is a deficient number, since it is larger than the sum of its proper divisors (241770395).

725311173 is a wasteful number, since it uses less digits than its factorization.

725311173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241770394.

The product of its digits is 4410, while the sum is 30.

The square root of 725311173 is about 26931.6017533306. The cubic root of 725311173 is about 898.4793964944.

The spelling of 725311173 in words is "seven hundred twenty-five million, three hundred eleven thousand, one hundred seventy-three".