90022091 has 4 divisors (see below), whose sum is σ = 92115672. Its totient is φ = 87928512.

The previous prime is 90022087. The next prime is 90022117. The reversal of 90022091 is 19022009.

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 90022091 - 2² = 90022087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90022291) 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, 1046726 + ... + 1046811.

It is an arithmetic number, because the mean of its divisors is an integer number (23028918).

Almost surely, 2^90022091 is an apocalyptic number.

90022091 is a deficient number, since it is larger than the sum of its proper divisors (2093581).

90022091 is a wasteful number, since it uses less digits than its factorization.

90022091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2093580.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 90022091 is about 9487.9972069979. The cubic root of 90022091 is about 448.1771378459.

The spelling of 90022091 in words is "ninety million, twenty-two thousand, ninety-one".