90623 has 4 divisors (see below), whose sum is σ = 97608. Its totient is φ = 83640.

The previous prime is 90619. The next prime is 90631. The reversal of 90623 is 32609.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90623 - 2² = 90619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90595 and 90604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90023) 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, 3473 + ... + 3498.

It is an arithmetic number, because the mean of its divisors is an integer number (24402).

2⁹⁰⁶²³ is an apocalyptic number.

90623 is a deficient number, since it is larger than the sum of its proper divisors (6985).

90623 is a wasteful number, since it uses less digits than its factorization.

90623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6984.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 90623 is about 301.0365426323. The cubic root of 90623 is about 44.9172140482.

It can be divided in two parts, 906 and 23, that added together give a palindrome (929).

The spelling of 90623 in words is "ninety thousand, six hundred twenty-three".