12873391 has 2 divisors, whose sum is σ = 12873392. Its totient is φ = 12873390.

The previous prime is 12873337. The next prime is 12873407. The reversal of 12873391 is 19337821.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12873391 - 2⁹ = 12872879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12873191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6436695 + 6436696.

It is an arithmetic number, because the mean of its divisors is an integer number (6436696).

Almost surely, 2^12873391 is an apocalyptic number.

12873391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12873391 is an equidigital number, since it uses as much as digits as its factorization.

12873391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 12873391 is about 3587.9508079125. The cubic root of 12873391 is about 234.3676435261.

The spelling of 12873391 in words is "twelve million, eight hundred seventy-three thousand, three hundred ninety-one".