90023 has 2 divisors, whose sum is σ = 90024. Its totient is φ = 90022.

The previous prime is 90019. The next prime is 90031. The reversal of 90023 is 32009.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90023 - 2² = 90019 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45011 + 45012.

It is an arithmetic number, because the mean of its divisors is an integer number (45012).

2⁹⁰⁰²³ is an apocalyptic number.

90023 is a deficient number, since it is larger than the sum of its proper divisors (1).

90023 is an equidigital number, since it uses as much as digits as its factorization.

90023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 90023 is about 300.0383308846. The cubic root of 90023 is about 44.8178646334.

Subtracting from 90023 its sum of digits (14), we obtain a palindrome (90009).

The spelling of 90023 in words is "ninety thousand, twenty-three".