86805599 has 2 divisors, whose sum is σ = 86805600. Its totient is φ = 86805598.

The previous prime is 86805571. The next prime is 86805637. The reversal of 86805599 is 99550868.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86805599 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 (86805899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43402799 + 43402800.

It is an arithmetic number, because the mean of its divisors is an integer number (43402800).

Almost surely, 2^86805599 is an apocalyptic number.

86805599 is a deficient number, since it is larger than the sum of its proper divisors (1).

86805599 is an equidigital number, since it uses as much as digits as its factorization.

86805599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 777600, while the sum is 50.

The square root of 86805599 is about 9316.9522377224. The cubic root of 86805599 is about 442.7744776927.

The spelling of 86805599 in words is "eighty-six million, eight hundred five thousand, five hundred ninety-nine".