2789912189 has 2 divisors, whose sum is σ = 2789912190. Its totient is φ = 2789912188.

The previous prime is 2789912171. The next prime is 2789912231. The reversal of 2789912189 is 9812199872.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2733512089 + 56400100 = 52283^2 + 7510^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2789912189 is a prime.

It is a super-2 number, since 2×2789912189² = 15567220044661543442, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2789912129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1394956094 + 1394956095.

It is an arithmetic number, because the mean of its divisors is an integer number (1394956095).

Almost surely, 2^2789912189 is an apocalyptic number.

It is an amenable number.

2789912189 is a deficient number, since it is larger than the sum of its proper divisors (1).

2789912189 is an equidigital number, since it uses as much as digits as its factorization.

2789912189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 56.

The square root of 2789912189 is about 52819.6193568261. The cubic root of 2789912189 is about 1407.7650472403.

The spelling of 2789912189 in words is "two billion, seven hundred eighty-nine million, nine hundred twelve thousand, one hundred eighty-nine".