39513925 has 12 divisors (see below), whose sum is σ = 53451936. Its totient is φ = 28737200.

The previous prime is 39513911. The next prime is 39513937. The reversal of 39513925 is 52931593.

It is not a de Polignac number, because 39513925 - 2⁹ = 39513413 is a prime.

It is a super-2 number, since 2×39513925² = 3122700537811250, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 71569 + ... + 72118.

It is an arithmetic number, because the mean of its divisors is an integer number (4454328).

Almost surely, 2^39513925 is an apocalyptic number.

It is an amenable number.

39513925 is a deficient number, since it is larger than the sum of its proper divisors (13938011).

39513925 is a wasteful number, since it uses less digits than its factorization.

39513925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143708 (or 143703 counting only the distinct ones).

The product of its digits is 36450, while the sum is 37.

The square root of 39513925 is about 6286.0102608889. The cubic root of 39513925 is about 340.6042455721.

The spelling of 39513925 in words is "thirty-nine million, five hundred thirteen thousand, nine hundred twenty-five".