86399 has 2 divisors, whose sum is σ = 86400. Its totient is φ = 86398.

The previous prime is 86389. The next prime is 86413. The reversal of 86399 is 99368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86399 - 2⁸ = 86143 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43199 + 43200.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2⁸⁶³⁹⁹ is an apocalyptic number.

86399 is a deficient number, since it is larger than the sum of its proper divisors (1).

86399 is an equidigital number, since it uses as much as digits as its factorization.

86399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 86399 is about 293.9370680945. The cubic root of 86399 is about 44.2082074260.

The spelling of 86399 in words is "eighty-six thousand, three hundred ninety-nine".