90115583 has 2 divisors, whose sum is σ = 90115584. Its totient is φ = 90115582.

The previous prime is 90115577. The next prime is 90115601. The reversal of 90115583 is 38551109.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90115583 - 2⁸ = 90115327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90115513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45057791 + 45057792.

It is an arithmetic number, because the mean of its divisors is an integer number (45057792).

Almost surely, 2^90115583 is an apocalyptic number.

90115583 is a deficient number, since it is larger than the sum of its proper divisors (1).

90115583 is an equidigital number, since it uses as much as digits as its factorization.

90115583 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 90115583 is about 9492.9227848961. The cubic root of 90115583 is about 448.3322348875.

The spelling of 90115583 in words is "ninety million, one hundred fifteen thousand, five hundred eighty-three".