90200189 has 2 divisors, whose sum is σ = 90200190. Its totient is φ = 90200188.

The previous prime is 90200183. The next prime is 90200213. The reversal of 90200189 is 98100209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54140164 + 36060025 = 7358^2 + 6005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90200189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90200183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45100094 + 45100095.

It is an arithmetic number, because the mean of its divisors is an integer number (45100095).

Almost surely, 2^90200189 is an apocalyptic number.

It is an amenable number.

90200189 is a deficient number, since it is larger than the sum of its proper divisors (1).

90200189 is an equidigital number, since it uses as much as digits as its factorization.

90200189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 90200189 is about 9497.3780065869. The cubic root of 90200189 is about 448.4724982070.

The spelling of 90200189 in words is "ninety million, two hundred thousand, one hundred eighty-nine".