87131875 has 20 divisors (see below), whose sum is σ = 109964800. Its totient is φ = 69012000.

The previous prime is 87131867. The next prime is 87131881. The reversal of 87131875 is 57813178.

It is a happy number.

It is not a de Polignac number, because 87131875 - 2³ = 87131867 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 67486 + ... + 68764.

It is an arithmetic number, because the mean of its divisors is an integer number (5498240).

Almost surely, 2^87131875 is an apocalyptic number.

87131875 is a deficient number, since it is larger than the sum of its proper divisors (22832925).

87131875 is a wasteful number, since it uses less digits than its factorization.

87131875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408 (or 1393 counting only the distinct ones).

The product of its digits is 47040, while the sum is 40.

The square root of 87131875 is about 9334.4456182464. The cubic root of 87131875 is about 443.3285358869.

The spelling of 87131875 in words is "eighty-seven million, one hundred thirty-one thousand, eight hundred seventy-five".