12904399 has 2 divisors, whose sum is σ = 12904400. Its totient is φ = 12904398.

The previous prime is 12904373. The next prime is 12904447. The reversal of 12904399 is 99340921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12904399 - 2⁷ = 12904271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12904319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6452199 + 6452200.

It is an arithmetic number, because the mean of its divisors is an integer number (6452200).

Almost surely, 2^12904399 is an apocalyptic number.

12904399 is a deficient number, since it is larger than the sum of its proper divisors (1).

12904399 is an equidigital number, since it uses as much as digits as its factorization.

12904399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17496, while the sum is 37.

The square root of 12904399 is about 3592.2693384545. The cubic root of 12904399 is about 234.5556655948. Note that the first 3 decimals are identical.

The spelling of 12904399 in words is "twelve million, nine hundred four thousand, three hundred ninety-nine".