90504223 has 4 divisors (see below), whose sum is σ = 90569248. Its totient is φ = 90439200.

The previous prime is 90504119. The next prime is 90504233. The reversal of 90504223 is 32240509.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32240509 = 7 ⋅4605787.

It is a cyclic number.

It is not a de Polignac number, because 90504223 - 2²⁵ = 56949791 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 (90504233) 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, 30378 + ... + 33223.

It is an arithmetic number, because the mean of its divisors is an integer number (22642312).

Almost surely, 2^90504223 is an apocalyptic number.

90504223 is a deficient number, since it is larger than the sum of its proper divisors (65025).

90504223 is a wasteful number, since it uses less digits than its factorization.

90504223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65024.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 90504223 is about 9513.3707485833. The cubic root of 90504223 is about 448.9758156163.

The spelling of 90504223 in words is "ninety million, five hundred four thousand, two hundred twenty-three".