725139239 has 8 divisors (see below), whose sum is σ = 825455232. Its totient is φ = 630555640.

The previous prime is 725139227. The next prime is 725139253. The reversal of 725139239 is 932931527.

It is a happy number.

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

It is not a de Polignac number, because 725139239 - 2⁴ = 725139223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 725139196 and 725139205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725139299) 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, 1432829 + ... + 1433334.

It is an arithmetic number, because the mean of its divisors is an integer number (103181904).

Almost surely, 2^725139239 is an apocalyptic number.

725139239 is a deficient number, since it is larger than the sum of its proper divisors (100315993).

725139239 is a wasteful number, since it uses less digits than its factorization.

725139239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2866197.

The product of its digits is 102060, while the sum is 41.

The square root of 725139239 is about 26928.4095148600. The cubic root of 725139239 is about 898.4083964555.

The spelling of 725139239 in words is "seven hundred twenty-five million, one hundred thirty-nine thousand, two hundred thirty-nine".