12937409 has 2 divisors, whose sum is σ = 12937410. Its totient is φ = 12937408.

The previous prime is 12937403. The next prime is 12937417. The reversal of 12937409 is 90473921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12623809 + 313600 = 3553^2 + 560^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12937409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12937403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6468704 + 6468705.

It is an arithmetic number, because the mean of its divisors is an integer number (6468705).

Almost surely, 2^12937409 is an apocalyptic number.

It is an amenable number.

12937409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12937409 is an equidigital number, since it uses as much as digits as its factorization.

12937409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 12937409 is about 3596.8609925878. The cubic root of 12937409 is about 234.7554964135.

The spelling of 12937409 in words is "twelve million, nine hundred thirty-seven thousand, four hundred nine".