37920725 has 6 divisors (see below), whose sum is σ = 47021730. Its totient is φ = 30336560.

The previous prime is 37920691. The next prime is 37920731. The reversal of 37920725 is 52702973.

It can be written as a sum of positive squares in 3 ways, for example, as 5726449 + 32194276 = 2393^2 + 5674^2 .

It is not a de Polignac number, because 37920725 - 2¹⁰ = 37919701 is a prime.

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, 758390 + ... + 758439.

It is an arithmetic number, because the mean of its divisors is an integer number (7836955).

Almost surely, 2^37920725 is an apocalyptic number.

It is an amenable number.

37920725 is a deficient number, since it is larger than the sum of its proper divisors (9101005).

37920725 is a wasteful number, since it uses less digits than its factorization.

37920725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516839 (or 1516834 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 35.

The square root of 37920725 is about 6157.9805943182. The cubic root of 37920725 is about 335.9635879145.

The spelling of 37920725 in words is "thirty-seven million, nine hundred twenty thousand, seven hundred twenty-five".