87112936691 has 4 divisors (see below), whose sum is σ = 95032294584. Its totient is φ = 79193578800.

The previous prime is 87112936663. The next prime is 87112936697. The reversal of 87112936691 is 19663921178.

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 87112936691 - 2²² = 87108742387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87112936697) 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, 3959678930 + ... + 3959678951.

It is an arithmetic number, because the mean of its divisors is an integer number (23758073646).

Almost surely, 2^87112936691 is an apocalyptic number.

87112936691 is a deficient number, since it is larger than the sum of its proper divisors (7919357893).

87112936691 is a wasteful number, since it uses less digits than its factorization.

87112936691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7919357892.

The product of its digits is 979776, while the sum is 53.

The spelling of 87112936691 in words is "eighty-seven billion, one hundred twelve million, nine hundred thirty-six thousand, six hundred ninety-one".