12693491 has 2 divisors, whose sum is σ = 12693492. Its totient is φ = 12693490.

The previous prime is 12693469. The next prime is 12693497. The reversal of 12693491 is 19439621.

It is a strong prime.

It is an emirp because it is prime and its reverse (19439621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12693491 is a prime.

It is a super-2 number, since 2×12693491² = 322249427534162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12693497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6346745 + 6346746.

It is an arithmetic number, because the mean of its divisors is an integer number (6346746).

Almost surely, 2^12693491 is an apocalyptic number.

12693491 is a deficient number, since it is larger than the sum of its proper divisors (1).

12693491 is an equidigital number, since it uses as much as digits as its factorization.

12693491 is an odious number, because the sum of its binary digits is odd.

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

The square root of 12693491 is about 3562.7925844764. The cubic root of 12693491 is about 233.2707898131.

The spelling of 12693491 in words is "twelve million, six hundred ninety-three thousand, four hundred ninety-one".