12739789 has 6 divisors (see below), whose sum is σ = 12977034. Its totient is φ = 12503520.

The previous prime is 12739763. The next prime is 12739799. The reversal of 12739789 is 98793721.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2924100 + 9815689 = 1710^2 + 3133^2 .

It is not a de Polignac number, because 12739789 - 2²¹ = 10642637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12739799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 27649 + ... + 28105.

It is an arithmetic number, because the mean of its divisors is an integer number (2162839).

Almost surely, 2^12739789 is an apocalyptic number.

It is an amenable number.

12739789 is a deficient number, since it is larger than the sum of its proper divisors (237245).

12739789 is an frugal number, since it uses more digits than its factorization.

12739789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 518 counting only the distinct ones).

The product of its digits is 190512, while the sum is 46.

The square root of 12739789 is about 3569.2841018893. The cubic root of 12739789 is about 233.5540548616.

The spelling of 12739789 in words is "twelve million, seven hundred thirty-nine thousand, seven hundred eighty-nine".