87788525 has 18 divisors (see below), whose sum is σ = 119657706. Its totient is φ = 63844000.

The previous prime is 87788521. The next prime is 87788537. The reversal of 87788525 is 52588778.

It can be written as a sum of positive squares in 3 ways, for example, as 26275876 + 61512649 = 5126^2 + 7843^2 .

It is not a de Polignac number, because 87788525 - 2² = 87788521 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 (87788521) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 11486 + ... + 17535.

Almost surely, 2^87788525 is an apocalyptic number.

It is an amenable number.

87788525 is a deficient number, since it is larger than the sum of its proper divisors (31869181).

87788525 is a wasteful number, since it uses less digits than its factorization.

87788525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29053 (or 29037 counting only the distinct ones).

The product of its digits is 1254400, while the sum is 50.

The square root of 87788525 is about 9369.5530843258. The cubic root of 87788525 is about 444.4394321773.

The spelling of 87788525 in words is "eighty-seven million, seven hundred eighty-eight thousand, five hundred twenty-five".