90585983 has 4 divisors (see below), whose sum is σ = 94524528. Its totient is φ = 86647440.

The previous prime is 90585959. The next prime is 90586007. The reversal of 90585983 is 38958509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38958509 = 17 ⋅2291677.

It is an interprime number because it is at equal distance from previous prime (90585959) and next prime (90586007).

It is not a de Polignac number, because 90585983 - 2²⁰ = 89537407 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 (90585923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969238 + ... + 1969283.

It is an arithmetic number, because the mean of its divisors is an integer number (23631132).

Almost surely, 2^90585983 is an apocalyptic number.

90585983 is a deficient number, since it is larger than the sum of its proper divisors (3938545).

90585983 is a wasteful number, since it uses less digits than its factorization.

90585983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938544.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 90585983 is about 9517.6668884764. Note that the first 3 decimals coincide. The cubic root of 90585983 is about 449.1109740031.

The spelling of 90585983 in words is "ninety million, five hundred eighty-five thousand, nine hundred eighty-three".