12694391 has 2 divisors, whose sum is σ = 12694392. Its totient is φ = 12694390.

The previous prime is 12694369. The next prime is 12694397. The reversal of 12694391 is 19349621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12694391 - 2⁶ = 12694327 is a prime.

It is a super-2 number, since 2×12694391² = 322295125721762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12694397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6347195 + 6347196.

It is an arithmetic number, because the mean of its divisors is an integer number (6347196).

Almost surely, 2^12694391 is an apocalyptic number.

12694391 is a deficient number, since it is larger than the sum of its proper divisors (1).

12694391 is an equidigital number, since it uses as much as digits as its factorization.

12694391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 12694391 is about 3562.9188876538. The cubic root of 12694391 is about 233.2763028420.

The spelling of 12694391 in words is "twelve million, six hundred ninety-four thousand, three hundred ninety-one".