12904993 has 2 divisors, whose sum is σ = 12904994. Its totient is φ = 12904992.

The previous prime is 12904987. The next prime is 12905003. The reversal of 12904993 is 39940921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12027024 + 877969 = 3468^2 + 937^2 .

It is an emirp because it is prime and its reverse (39940921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12904993 - 2⁵ = 12904961 is a prime.

It is not a weakly prime, because it can be changed into another prime (12904193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6452496 + 6452497.

It is an arithmetic number, because the mean of its divisors is an integer number (6452497).

Almost surely, 2^12904993 is an apocalyptic number.

It is an amenable number.

12904993 is a deficient number, since it is larger than the sum of its proper divisors (1).

12904993 is an equidigital number, since it uses as much as digits as its factorization.

12904993 is an evil number, because the sum of its binary digits is even.

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

The square root of 12904993 is about 3592.3520150453. The cubic root of 12904993 is about 234.5592644690.

The spelling of 12904993 in words is "twelve million, nine hundred four thousand, nine hundred ninety-three".