90555583 has 12 divisors (see below), whose sum is σ = 96964992. Its totient is φ = 84274880.

The previous prime is 90555571. The next prime is 90555587. The reversal of 90555583 is 38555509.

It is not a de Polignac number, because 90555583 - 2¹⁷ = 90424511 is a prime.

It is a super-2 number, since 2×90555583² = 16400627224939778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90555587) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 474018 + ... + 474208.

It is an arithmetic number, because the mean of its divisors is an integer number (8080416).

Almost surely, 2^90555583 is an apocalyptic number.

90555583 is a deficient number, since it is larger than the sum of its proper divisors (6409409).

90555583 is a wasteful number, since it uses less digits than its factorization.

90555583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 40.

The square root of 90555583 is about 9516.0697244188. The cubic root of 90555583 is about 449.0607289184.

The spelling of 90555583 in words is "ninety million, five hundred fifty-five thousand, five hundred eighty-three".