12981737 has 2 divisors, whose sum is σ = 12981738. Its totient is φ = 12981736.

The previous prime is 12981733. The next prime is 12981751. The reversal of 12981737 is 73718921.

12981737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10896601 + 2085136 = 3301^2 + 1444^2 .

It is a cyclic number.

It is not a de Polignac number, because 12981737 - 2² = 12981733 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12981737.

It is not a weakly prime, because it can be changed into another prime (12981733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6490868 + 6490869.

It is an arithmetic number, because the mean of its divisors is an integer number (6490869).

Almost surely, 2^12981737 is an apocalyptic number.

It is an amenable number.

12981737 is a deficient number, since it is larger than the sum of its proper divisors (1).

12981737 is an equidigital number, since it uses as much as digits as its factorization.

12981737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 38.

The square root of 12981737 is about 3603.0177629315. The cubic root of 12981737 is about 235.0233083867.

It can be divided in two parts, 1298 and 1737, that multiplied together give a triangular number (2254626 = T₂₁₂₃).

The spelling of 12981737 in words is "twelve million, nine hundred eighty-one thousand, seven hundred thirty-seven".