12917969 has 4 divisors (see below), whose sum is σ = 12925440. Its totient is φ = 12910500.

The previous prime is 12917959. The next prime is 12917981. The reversal of 12917969 is 96971921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 96971921 = 619 ⋅156659.

It is a cyclic number.

It is not a de Polignac number, because 12917969 - 2²⁰ = 11869393 is a prime.

It is a super-2 number, since 2×12917969² = 333747846169922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12917939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344 + ... + 5094.

It is an arithmetic number, because the mean of its divisors is an integer number (3231360).

Almost surely, 2^12917969 is an apocalyptic number.

It is an amenable number.

12917969 is a deficient number, since it is larger than the sum of its proper divisors (7471).

12917969 is an equidigital number, since it uses as much as digits as its factorization.

12917969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7470.

The product of its digits is 61236, while the sum is 44.

The square root of 12917969 is about 3594.1576203611. The cubic root of 12917969 is about 234.6378547598.

The spelling of 12917969 in words is "twelve million, nine hundred seventeen thousand, nine hundred sixty-nine".