90108959 has 4 divisors (see below), whose sum is σ = 95409504. Its totient is φ = 84808416.

The previous prime is 90108943. The next prime is 90108979. The reversal of 90108959 is 95980109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95980109 = 37 ⋅2594057.

It is a cyclic number.

It is not a de Polignac number, because 90108959 - 2⁴ = 90108943 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90108919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2650247 + ... + 2650280.

It is an arithmetic number, because the mean of its divisors is an integer number (23852376).

Almost surely, 2^90108959 is an apocalyptic number.

90108959 is a deficient number, since it is larger than the sum of its proper divisors (5300545).

90108959 is a wasteful number, since it uses less digits than its factorization.

90108959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5300544.

The product of its (nonzero) digits is 29160, while the sum is 41.

The square root of 90108959 is about 9492.5738869919. The cubic root of 90108959 is about 448.3212496417.

The spelling of 90108959 in words is "ninety million, one hundred eight thousand, nine hundred fifty-nine".