12749189 has 2 divisors, whose sum is σ = 12749190. Its totient is φ = 12749188.

The previous prime is 12749179. The next prime is 12749197. The reversal of 12749189 is 98194721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12602500 + 146689 = 3550^2 + 383^2 .

It is a cyclic number.

It is not a de Polignac number, because 12749189 - 2⁸ = 12748933 is a prime.

It is a Sophie Germain 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 (12749159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6374594 + 6374595.

It is an arithmetic number, because the mean of its divisors is an integer number (6374595).

Almost surely, 2^12749189 is an apocalyptic number.

It is an amenable number.

12749189 is a deficient number, since it is larger than the sum of its proper divisors (1).

12749189 is an equidigital number, since it uses as much as digits as its factorization.

12749189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 41.

The square root of 12749189 is about 3570.6006497507. The cubic root of 12749189 is about 233.6114830335.

The spelling of 12749189 in words is "twelve million, seven hundred forty-nine thousand, one hundred eighty-nine".