86988591 has 24 divisors (see below), whose sum is σ = 129704640. Its totient is φ = 56137536.

The previous prime is 86988581. The next prime is 86988607. The reversal of 86988591 is 19588968.

It is not a de Polignac number, because 86988591 - 2⁹ = 86988079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86988521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79041 + ... + 80133.

It is an arithmetic number, because the mean of its divisors is an integer number (5404360).

Almost surely, 2^86988591 is an apocalyptic number.

86988591 is a deficient number, since it is larger than the sum of its proper divisors (42716049).

86988591 is a wasteful number, since it uses less digits than its factorization.

86988591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375 (or 1372 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The square root of 86988591 is about 9326.7674464415. The cubic root of 86988591 is about 443.0853920420.

The spelling of 86988591 in words is "eighty-six million, nine hundred eighty-eight thousand, five hundred ninety-one".