90098221 has 4 divisors (see below), whose sum is σ = 90218944. Its totient is φ = 89977500.

The previous prime is 90098213. The next prime is 90098237. The reversal of 90098221 is 12289009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90098221 - 2³ = 90098213 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 (90098321) 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, 59235 + ... + 60736.

It is an arithmetic number, because the mean of its divisors is an integer number (22554736).

Almost surely, 2^90098221 is an apocalyptic number.

It is an amenable number.

90098221 is a deficient number, since it is larger than the sum of its proper divisors (120723).

90098221 is a wasteful number, since it uses less digits than its factorization.

90098221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120722.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 90098221 is about 9492.0082701186. The cubic root of 90098221 is about 448.3034405919.

The spelling of 90098221 in words is "ninety million, ninety-eight thousand, two hundred twenty-one".