12739537 has 2 divisors, whose sum is σ = 12739538. Its totient is φ = 12739536.

The previous prime is 12739513. The next prime is 12739577. The reversal of 12739537 is 73593721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8346321 + 4393216 = 2889^2 + 2096^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12739537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12739496 and 12739505.

It is not a weakly prime, because it can be changed into another prime (12739577) 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 as a sum of consecutive naturals, namely, 6369768 + 6369769.

It is an arithmetic number, because the mean of its divisors is an integer number (6369769).

Almost surely, 2^12739537 is an apocalyptic number.

It is an amenable number.

12739537 is a deficient number, since it is larger than the sum of its proper divisors (1).

12739537 is an equidigital number, since it uses as much as digits as its factorization.

12739537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 37.

The square root of 12739537 is about 3569.2488005181. The cubic root of 12739537 is about 233.5525149091.

The spelling of 12739537 in words is "twelve million, seven hundred thirty-nine thousand, five hundred thirty-seven".