87975871 has 4 divisors (see below), whose sum is σ = 92606200. Its totient is φ = 83345544.

The previous prime is 87975829. The next prime is 87975883. The reversal of 87975871 is 17857978.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 87975871 - 2¹⁵ = 87943103 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 (87975271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2315136 + ... + 2315173.

It is an arithmetic number, because the mean of its divisors is an integer number (23151550).

Almost surely, 2^87975871 is an apocalyptic number.

87975871 is a deficient number, since it is larger than the sum of its proper divisors (4630329).

87975871 is a wasteful number, since it uses less digits than its factorization.

87975871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4630328.

The product of its digits is 987840, while the sum is 52.

The square root of 87975871 is about 9379.5453514549. The cubic root of 87975871 is about 444.7553610525.

The spelling of 87975871 in words is "eighty-seven million, nine hundred seventy-five thousand, eight hundred seventy-one".