87809925 has 48 divisors (see below), whose sum is σ = 174671360. Its totient is φ = 38024640.

The previous prime is 87809903. The next prime is 87809977. The reversal of 87809925 is 52990878.

It is a happy number.

It is not a de Polignac number, because 87809925 - 2¹¹ = 87807877 is a prime.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 5574 + ... + 14376.

Almost surely, 2^87809925 is an apocalyptic number.

It is an amenable number.

87809925 is a deficient number, since it is larger than the sum of its proper divisors (86861435).

87809925 is a wasteful number, since it uses less digits than its factorization.

87809925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8842 (or 8837 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 87809925 is about 9370.6950115773. The cubic root of 87809925 is about 444.4755425578.

The spelling of 87809925 in words is "eighty-seven million, eight hundred nine thousand, nine hundred twenty-five".