12931393 has 2 divisors, whose sum is σ = 12931394. Its totient is φ = 12931392.

The previous prime is 12931379. The next prime is 12931409. The reversal of 12931393 is 39313921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7011904 + 5919489 = 2648^2 + 2433^2 .

It is a cyclic number.

It is not a de Polignac number, because 12931393 - 2⁹ = 12930881 is a prime.

It is not a weakly prime, because it can be changed into another prime (12931363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6465696 + 6465697.

It is an arithmetic number, because the mean of its divisors is an integer number (6465697).

Almost surely, 2^12931393 is an apocalyptic number.

It is an amenable number.

12931393 is a deficient number, since it is larger than the sum of its proper divisors (1).

12931393 is an equidigital number, since it uses as much as digits as its factorization.

12931393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4374, while the sum is 31.

The square root of 12931393 is about 3596.0246105943. The cubic root of 12931393 is about 234.7191030359.

The spelling of 12931393 in words is "twelve million, nine hundred thirty-one thousand, three hundred ninety-three".