12591893 has 2 divisors, whose sum is σ = 12591894. Its totient is φ = 12591892.

The previous prime is 12591857. The next prime is 12591907. The reversal of 12591893 is 39819521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11785489 + 806404 = 3433^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 12591893 - 2¹⁰ = 12590869 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12591823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6295946 + 6295947.

It is an arithmetic number, because the mean of its divisors is an integer number (6295947).

Almost surely, 2^12591893 is an apocalyptic number.

It is an amenable number.

12591893 is a deficient number, since it is larger than the sum of its proper divisors (1).

12591893 is an equidigital number, since it uses as much as digits as its factorization.

12591893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 38.

The square root of 12591893 is about 3548.5057418581. The cubic root of 12591893 is about 232.6467597720.

The spelling of 12591893 in words is "twelve million, five hundred ninety-one thousand, eight hundred ninety-three".