86391 has 12 divisors (see below), whose sum is σ = 129480. Its totient is φ = 55440.

The previous prime is 86389. The next prime is 86399. The reversal of 86391 is 19368.

It is not a de Polignac number, because 86391 - 2¹ = 86389 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86399) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96 + ... + 426.

It is an arithmetic number, because the mean of its divisors is an integer number (10790).

2⁸⁶³⁹¹ is an apocalyptic number.

86391 is a deficient number, since it is larger than the sum of its proper divisors (43089).

86391 is a wasteful number, since it uses less digits than its factorization.

86391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 363 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 86391 is about 293.9234594244. The cubic root of 86391 is about 44.2068429173.

The spelling of 86391 in words is "eighty-six thousand, three hundred ninety-one".