90200209 has 8 divisors (see below), whose sum is σ = 98595360. Its totient is φ = 81837600.

The previous prime is 90200189. The next prime is 90200213.

90200209 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 90200209 - 2⁵ = 90200177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90200209.

It is not an unprimeable number, because it can be changed into a prime (90200219) 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, 2139 + ... + 13600.

It is an arithmetic number, because the mean of its divisors is an integer number (12324420).

Almost surely, 2^90200209 is an apocalyptic number.

It is an amenable number.

90200209 is a deficient number, since it is larger than the sum of its proper divisors (8395151).

90200209 is a wasteful number, since it uses less digits than its factorization.

90200209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16271.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 90200209 is about 9497.3790595090. The cubic root of 90200209 is about 448.4725313534.

It can be divided in two parts, 90200 and 209, that added together give a palindrome (90409).

The spelling of 90200209 in words is "ninety million, two hundred thousand, two hundred nine".