902138189 has 2 divisors, whose sum is σ = 902138190. Its totient is φ = 902138188.

The previous prime is 902138147. The next prime is 902138197. The reversal of 902138189 is 981831209.

902138189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 701349289 + 200788900 = 26483^2 + 14170^2 .

It is a cyclic number.

It is not a de Polignac number, because 902138189 - 2²⁸ = 633702733 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (902138789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 451069094 + 451069095.

It is an arithmetic number, because the mean of its divisors is an integer number (451069095).

Almost surely, 2^902138189 is an apocalyptic number.

It is an amenable number.

902138189 is a deficient number, since it is larger than the sum of its proper divisors (1).

902138189 is an equidigital number, since it uses as much as digits as its factorization.

902138189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 902138189 is about 30035.6153424564. The cubic root of 902138189 is about 966.2533720477.

The spelling of 902138189 in words is "nine hundred two million, one hundred thirty-eight thousand, one hundred eighty-nine".