90220002209 has 2 divisors, whose sum is σ = 90220002210. Its totient is φ = 90220002208.

The previous prime is 90220002139. The next prime is 90220002221.

90220002209 is nontrivially palindromic in base 10.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53460376225 + 36759625984 = 231215^2 + 191728^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 90220002209 - 2²⁰ = 90218953633 is a prime.

It is not a weakly prime, because it can be changed into another prime (90220002289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45110001104 + 45110001105.

It is an arithmetic number, because the mean of its divisors is an integer number (45110001105).

Almost surely, 2^90220002209 is an apocalyptic number.

It is an amenable number.

90220002209 is a deficient number, since it is larger than the sum of its proper divisors (1).

90220002209 is an equidigital number, since it uses as much as digits as its factorization.

90220002209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

It can be divided in two parts, 9022000 and 2209, that added together give a palindrome (9024209).

The spelling of 90220002209 in words is "ninety billion, two hundred twenty million, two thousand, two hundred nine".