87936490887 has 16 divisors (see below), whose sum is σ = 136733126400. Its totient is φ = 50249422776.

The previous prime is 87936490877. The next prime is 87936490891. The reversal of 87936490887 is 78809463978.

It is not a de Polignac number, because 87936490887 - 2⁴ = 87936490871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87936490877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42728073 + ... + 42730130.

It is an arithmetic number, because the mean of its divisors is an integer number (8545820400).

Almost surely, 2^87936490887 is an apocalyptic number.

87936490887 is a deficient number, since it is larger than the sum of its proper divisors (48796635513).

87936490887 is an equidigital number, since it uses as much as digits as its factorization.

87936490887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85458227 (or 85458213 counting only the distinct ones).

The product of its (nonzero) digits is 146313216, while the sum is 69.

The spelling of 87936490887 in words is "eighty-seven billion, nine hundred thirty-six million, four hundred ninety thousand, eight hundred eighty-seven".