90634648189 has 2 divisors, whose sum is σ = 90634648190. Its totient is φ = 90634648188.

The previous prime is 90634648183. The next prime is 90634648193. The reversal of 90634648189 is 98184643609.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90631102500 + 3545689 = 301050^2 + 1883^2 .

It is a cyclic number.

It is not a de Polignac number, because 90634648189 - 2⁷ = 90634648061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90634648183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45317324094 + 45317324095.

It is an arithmetic number, because the mean of its divisors is an integer number (45317324095).

Almost surely, 2^90634648189 is an apocalyptic number.

It is an amenable number.

90634648189 is a deficient number, since it is larger than the sum of its proper divisors (1).

90634648189 is an equidigital number, since it uses as much as digits as its factorization.

90634648189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8957952, while the sum is 58.

The spelling of 90634648189 in words is "ninety billion, six hundred thirty-four million, six hundred forty-eight thousand, one hundred eighty-nine".