90990023 has 8 divisors (see below), whose sum is σ = 94710000. Its totient is φ = 87308928.

The previous prime is 90990019. The next prime is 90990037. The reversal of 90990023 is 32009909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90990023 - 2² = 90990019 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 (90990013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4898 + ... + 14351.

It is an arithmetic number, because the mean of its divisors is an integer number (11838750).

Almost surely, 2^90990023 is an apocalyptic number.

90990023 is a deficient number, since it is larger than the sum of its proper divisors (3719977).

90990023 is a wasteful number, since it uses less digits than its factorization.

90990023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19441.

The product of its (nonzero) digits is 4374, while the sum is 32.

The square root of 90990023 is about 9538.8690629445. The cubic root of 90990023 is about 449.7777058455. Note that the first 4 decimals are identical.

The spelling of 90990023 in words is "ninety million, nine hundred ninety thousand, twenty-three".