87536187971 has 4 divisors (see below), whose sum is σ = 87538023744. Its totient is φ = 87534352200.

The previous prime is 87536187887. The next prime is 87536187997. The reversal of 87536187971 is 17978163578.

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 87536187971 - 2³⁴ = 70356318787 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87536186971) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 844400 + ... + 942381.

It is an arithmetic number, because the mean of its divisors is an integer number (21884505936).

Almost surely, 2^87536187971 is an apocalyptic number.

87536187971 is a deficient number, since it is larger than the sum of its proper divisors (1835773).

87536187971 is a wasteful number, since it uses less digits than its factorization.

87536187971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835772.

The product of its digits is 17781120, while the sum is 62.

The spelling of 87536187971 in words is "eighty-seven billion, five hundred thirty-six million, one hundred eighty-seven thousand, nine hundred seventy-one".