86321787 has 16 divisors (see below), whose sum is σ = 116693280. Its totient is φ = 56754432.

The previous prime is 86321749. The next prime is 86321791. The reversal of 86321787 is 78712368.

It is not a de Polignac number, because 86321787 - 2⁷ = 86321659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86321707) 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, 90103 + ... + 91055.

It is an arithmetic number, because the mean of its divisors is an integer number (7293330).

Almost surely, 2^86321787 is an apocalyptic number.

86321787 is a deficient number, since it is larger than the sum of its proper divisors (30371493).

86321787 is a wasteful number, since it uses less digits than its factorization.

86321787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1342.

The product of its digits is 112896, while the sum is 42.

The square root of 86321787 is about 9290.9518888002. The cubic root of 86321787 is about 441.9503418069.

The spelling of 86321787 in words is "eighty-six million, three hundred twenty-one thousand, seven hundred eighty-seven".