387665725 has 12 divisors (see below), whose sum is σ = 480983104. Its totient is φ = 309953520.

The previous prime is 387665723. The next prime is 387665741. The reversal of 387665725 is 527566783.

It is not a de Polignac number, because 387665725 - 2¹ = 387665723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (387665723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55372 + ... + 61978.

Almost surely, 2^387665725 is an apocalyptic number.

It is an amenable number.

387665725 is a deficient number, since it is larger than the sum of its proper divisors (93317379).

387665725 is a wasteful number, since it uses less digits than its factorization.

387665725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8964 (or 8959 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 49.

The square root of 387665725 is about 19689.2286542668. The cubic root of 387665725 is about 729.1537858223.

The spelling of 387665725 in words is "three hundred eighty-seven million, six hundred sixty-five thousand, seven hundred twenty-five".