86705599 has 2 divisors, whose sum is σ = 86705600. Its totient is φ = 86705598.

The previous prime is 86705557. The next prime is 86705603. The reversal of 86705599 is 99550768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 86705599 - 2⁷ = 86705471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86705539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43352799 + 43352800.

It is an arithmetic number, because the mean of its divisors is an integer number (43352800).

Almost surely, 2^86705599 is an apocalyptic number.

86705599 is a deficient number, since it is larger than the sum of its proper divisors (1).

86705599 is an equidigital number, since it uses as much as digits as its factorization.

86705599 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 49.

The square root of 86705599 is about 9311.5841294594. The cubic root of 86705599 is about 442.6043870468.

The spelling of 86705599 in words is "eighty-six million, seven hundred five thousand, five hundred ninety-nine".