87431875 has 10 divisors (see below), whose sum is σ = 109255652. Its totient is φ = 69945000.

The previous prime is 87431831. The next prime is 87431921. The reversal of 87431875 is 57813478.

It is not a de Polignac number, because 87431875 - 2⁹ = 87431363 is a prime.

It is a Duffinian number.

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 9 ways as a sum of consecutive naturals, for example, 69321 + ... + 70570.

Almost surely, 2^87431875 is an apocalyptic number.

87431875 is a deficient number, since it is larger than the sum of its proper divisors (21823777).

87431875 is an equidigital number, since it uses as much as digits as its factorization.

87431875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139911 (or 139896 counting only the distinct ones).

The product of its digits is 188160, while the sum is 43.

The square root of 87431875 is about 9350.5013234585. The cubic root of 87431875 is about 443.8367548425.

The spelling of 87431875 in words is "eighty-seven million, four hundred thirty-one thousand, eight hundred seventy-five".