725639007 has 8 divisors (see below), whose sum is σ = 968937984. Its totient is φ = 483049688.

The previous prime is 725638997. The next prime is 725639023. The reversal of 725639007 is 700936527.

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

It is a cyclic number.

It is not a de Polignac number, because 725639007 - 2⁶ = 725638943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725639027) 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 7 ways as a sum of consecutive naturals, for example, 175023 + ... + 179120.

It is an arithmetic number, because the mean of its divisors is an integer number (121117248).

Almost surely, 2^725639007 is an apocalyptic number.

725639007 is a deficient number, since it is larger than the sum of its proper divisors (243298977).

725639007 is a wasteful number, since it uses less digits than its factorization.

725639007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 354829.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 725639007 is about 26937.6874842664. The cubic root of 725639007 is about 898.6147442542.

The spelling of 725639007 in words is "seven hundred twenty-five million, six hundred thirty-nine thousand, seven".