12966431 has 2 divisors, whose sum is σ = 12966432. Its totient is φ = 12966430.

The previous prime is 12966413. The next prime is 12966433. The reversal of 12966431 is 13466921.

Together with previous prime (12966413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12966431 is a prime.

It is a super-2 number, since 2×12966431² = 336256665755522, which contains 22 as substring.

Together with 12966433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12966433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6483215 + 6483216.

It is an arithmetic number, because the mean of its divisors is an integer number (6483216).

Almost surely, 2^12966431 is an apocalyptic number.

12966431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12966431 is an equidigital number, since it uses as much as digits as its factorization.

12966431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 32.

The square root of 12966431 is about 3600.8930836669. The cubic root of 12966431 is about 234.9309046902.

The spelling of 12966431 in words is "twelve million, nine hundred sixty-six thousand, four hundred thirty-one".