725679 has 30 divisors (see below), whose sum is σ = 1188704. Its totient is φ = 440640.

The previous prime is 725671. The next prime is 725687. The reversal of 725679 is 976527.

It is an interprime number because it is at equal distance from previous prime (725671) and next prime (725687).

It is not a de Polignac number, because 725679 - 2³ = 725671 is a prime.

It is a super-2 number, since 2×725679² = 1053220022082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 23394 + ... + 23424.

2⁷²⁵⁶⁷⁹ is an apocalyptic number.

725679 is a deficient number, since it is larger than the sum of its proper divisors (463025).

725679 is a wasteful number, since it uses less digits than its factorization.

725679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77 (or 51 counting only the distinct ones).

The product of its digits is 26460, while the sum is 36.

The square root of 725679 is about 851.8679475130. The cubic root of 725679 is about 89.8631252756.

The spelling of 725679 in words is "seven hundred twenty-five thousand, six hundred seventy-nine".