87491975 has 6 divisors (see below), whose sum is σ = 108490080. Its totient is φ = 69993560.

The previous prime is 87491959. The next prime is 87492007. The reversal of 87491975 is 57919478.

It is not a de Polignac number, because 87491975 - 2⁴ = 87491959 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 (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1749815 + ... + 1749864.

It is an arithmetic number, because the mean of its divisors is an integer number (18081680).

Almost surely, 2^87491975 is an apocalyptic number.

87491975 is a deficient number, since it is larger than the sum of its proper divisors (20998105).

87491975 is a wasteful number, since it uses less digits than its factorization.

87491975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3499689 (or 3499684 counting only the distinct ones).

The product of its digits is 635040, while the sum is 50.

The square root of 87491975 is about 9353.7145028058. The cubic root of 87491975 is about 443.9384282095.

The spelling of 87491975 in words is "eighty-seven million, four hundred ninety-one thousand, nine hundred seventy-five".