90244209 has 8 divisors (see below), whose sum is σ = 131264352. Its totient is φ = 54693440.

The previous prime is 90244181. The next prime is 90244303.

90244209 is nontrivially palindromic in base 10.

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 90244209 - 2⁷ = 90244081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90244009) 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, 1367304 + ... + 1367369.

It is an arithmetic number, because the mean of its divisors is an integer number (16408044).

Almost surely, 2^90244209 is an apocalyptic number.

It is an amenable number.

90244209 is a deficient number, since it is larger than the sum of its proper divisors (41020143).

90244209 is a wasteful number, since it uses less digits than its factorization.

90244209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734687.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 90244209 is about 9499.6952056369. The cubic root of 90244209 is about 448.5454416932.

The spelling of 90244209 in words is "ninety million, two hundred forty-four thousand, two hundred nine".