90659599 has 2 divisors, whose sum is σ = 90659600. Its totient is φ = 90659598.

The previous prime is 90659579. The next prime is 90659669. The reversal of 90659599 is 99595609.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90659599 - 2²¹ = 88562447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90659549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45329799 + 45329800.

It is an arithmetic number, because the mean of its divisors is an integer number (45329800).

Almost surely, 2^90659599 is an apocalyptic number.

90659599 is a deficient number, since it is larger than the sum of its proper divisors (1).

90659599 is an equidigital number, since it uses as much as digits as its factorization.

90659599 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 984150, while the sum is 52.

The square root of 90659599 is about 9521.5334374249. The cubic root of 90659599 is about 449.2325998897.

The spelling of 90659599 in words is "ninety million, six hundred fifty-nine thousand, five hundred ninety-nine".