725404523 has 4 divisors (see below), whose sum is σ = 732586848. Its totient is φ = 718222200.

The previous prime is 725404507. The next prime is 725404531. The reversal of 725404523 is 325404527.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 725404523 - 2⁴ = 725404507 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 725404523.

It is not an unprimeable number, because it can be changed into a prime (725404223) 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, 3591011 + ... + 3591212.

It is an arithmetic number, because the mean of its divisors is an integer number (183146712).

Almost surely, 2^725404523 is an apocalyptic number.

725404523 is a deficient number, since it is larger than the sum of its proper divisors (7182325).

725404523 is a wasteful number, since it uses less digits than its factorization.

725404523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7182324.

The product of its (nonzero) digits is 33600, while the sum is 32.

The square root of 725404523 is about 26933.3347916666. The cubic root of 725404523 is about 898.5179406195.

The spelling of 725404523 in words is "seven hundred twenty-five million, four hundred four thousand, five hundred twenty-three".