12937649 has 2 divisors, whose sum is σ = 12937650. Its totient is φ = 12937648.

The previous prime is 12937621. The next prime is 12937667. The reversal of 12937649 is 94673921.

12937649 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., 12730624 + 207025 = 3568^2 + 455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12937649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12937669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6468824 + 6468825.

It is an arithmetic number, because the mean of its divisors is an integer number (6468825).

Almost surely, 2^12937649 is an apocalyptic number.

It is an amenable number.

12937649 is a deficient number, since it is larger than the sum of its proper divisors (1).

12937649 is an equidigital number, since it uses as much as digits as its factorization.

12937649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 41.

The square root of 12937649 is about 3596.8943548567. The cubic root of 12937649 is about 234.7569480429.

The spelling of 12937649 in words is "twelve million, nine hundred thirty-seven thousand, six hundred forty-nine".