72709925 has 6 divisors (see below), whose sum is σ = 90160338. Its totient is φ = 58167920.

The previous prime is 72709919. The next prime is 72709943. The reversal of 72709925 is 52990727.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 196 + 72709729 = 14^2 + 8527^2 .

It is not a de Polignac number, because 72709925 - 2¹⁴ = 72693541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1454174 + ... + 1454223.

It is an arithmetic number, because the mean of its divisors is an integer number (15026723).

Almost surely, 2^72709925 is an apocalyptic number.

It is an amenable number.

72709925 is a deficient number, since it is larger than the sum of its proper divisors (17450413).

72709925 is a wasteful number, since it uses less digits than its factorization.

72709925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2908407 (or 2908402 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 41.

The square root of 72709925 is about 8527.0114928971. The cubic root of 72709925 is about 417.3796131794.

The spelling of 72709925 in words is "seventy-two million, seven hundred nine thousand, nine hundred twenty-five".