12909131 has 2 divisors, whose sum is σ = 12909132. Its totient is φ = 12909130.

The previous prime is 12909109. The next prime is 12909139. The reversal of 12909131 is 13190921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12909131 is a prime.

It is a super-2 number, since 2×12909131² = 333291326350322, which contains 22 as substring.

It is a Sophie Germain 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 12909131.

It is not a weakly prime, because it can be changed into another prime (12909139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6454565 + 6454566.

It is an arithmetic number, because the mean of its divisors is an integer number (6454566).

Almost surely, 2^12909131 is an apocalyptic number.

12909131 is a deficient number, since it is larger than the sum of its proper divisors (1).

12909131 is an equidigital number, since it uses as much as digits as its factorization.

12909131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 12909131 is about 3592.9279146679. The cubic root of 12909131 is about 234.5843323507.

The spelling of 12909131 in words is "twelve million, nine hundred nine thousand, one hundred thirty-one".