725308137 has 12 divisors (see below), whose sum is σ = 1048829184. Its totient is φ = 483002520.

The previous prime is 725308123. The next prime is 725308159. The reversal of 725308137 is 731803527.

It is not a de Polignac number, because 725308137 - 2¹⁹ = 724783849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (725208137) 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 11 ways as a sum of consecutive naturals, for example, 36033 + ... + 52430.

It is an arithmetic number, because the mean of its divisors is an integer number (87402432).

Almost surely, 2^725308137 is an apocalyptic number.

It is an amenable number.

725308137 is a deficient number, since it is larger than the sum of its proper divisors (323521047).

725308137 is a wasteful number, since it uses less digits than its factorization.

725308137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89380 (or 89377 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 725308137 is about 26931.5453882617. The cubic root of 725308137 is about 898.4781428774.

The spelling of 725308137 in words is "seven hundred twenty-five million, three hundred eight thousand, one hundred thirty-seven".