90443589 has 4 divisors (see below), whose sum is σ = 120591456. Its totient is φ = 60295724.

The previous prime is 90443527. The next prime is 90443593. The reversal of 90443589 is 98534409.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90443589 - 2¹¹ = 90441541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90443589.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90444589) 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, 15073929 + ... + 15073934.

It is an arithmetic number, because the mean of its divisors is an integer number (30147864).

Almost surely, 2^90443589 is an apocalyptic number.

It is an amenable number.

90443589 is a deficient number, since it is larger than the sum of its proper divisors (30147867).

90443589 is a wasteful number, since it uses less digits than its factorization.

90443589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30147866.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 90443589 is about 9510.1834367167. The cubic root of 90443589 is about 448.8755282837.

The spelling of 90443589 in words is "ninety million, four hundred forty-three thousand, five hundred eighty-nine".