90290923 has 4 divisors (see below), whose sum is σ = 90309960. Its totient is φ = 90271888.

The previous prime is 90290911. The next prime is 90290929. The reversal of 90290923 is 32909209.

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 90290923 - 2²¹ = 88193771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90290929) 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, 3936 + ... + 14002.

It is an arithmetic number, because the mean of its divisors is an integer number (22577490).

Almost surely, 2^90290923 is an apocalyptic number.

90290923 is a deficient number, since it is larger than the sum of its proper divisors (19037).

90290923 is a wasteful number, since it uses less digits than its factorization.

90290923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19036.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 90290923 is about 9502.1535980008. The cubic root of 90290923 is about 448.6228233432.

The spelling of 90290923 in words is "ninety million, two hundred ninety thousand, nine hundred twenty-three".