90136599 has 16 divisors (see below), whose sum is σ = 138436608. Its totient is φ = 51099552.

The previous prime is 90136591. The next prime is 90136603. The reversal of 90136599 is 99563109.

It is not a de Polignac number, because 90136599 - 2³ = 90136591 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90136599.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90136591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14232 + ... + 19565.

It is an arithmetic number, because the mean of its divisors is an integer number (8652288).

Almost surely, 2^90136599 is an apocalyptic number.

90136599 is a deficient number, since it is larger than the sum of its proper divisors (48300009).

90136599 is a wasteful number, since it uses less digits than its factorization.

90136599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33934.

The product of its (nonzero) digits is 65610, while the sum is 42.

The square root of 90136599 is about 9494.0296502592. The cubic root of 90136599 is about 448.3670842723.

The spelling of 90136599 in words is "ninety million, one hundred thirty-six thousand, five hundred ninety-nine".