90931223 has 4 divisors (see below), whose sum is σ = 91179360. Its totient is φ = 90683088.

The previous prime is 90931201. The next prime is 90931271. The reversal of 90931223 is 32213909.

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 90931223 - 2²⁴ = 74154007 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 (90931523) 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, 123518 + ... + 124251.

It is an arithmetic number, because the mean of its divisors is an integer number (22794840).

Almost surely, 2^90931223 is an apocalyptic number.

90931223 is a deficient number, since it is larger than the sum of its proper divisors (248137).

90931223 is a wasteful number, since it uses less digits than its factorization.

90931223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248136.

The product of its (nonzero) digits is 2916, while the sum is 29.

The square root of 90931223 is about 9535.7864384643. The cubic root of 90931223 is about 449.6807991475.

The spelling of 90931223 in words is "ninety million, nine hundred thirty-one thousand, two hundred twenty-three".