12917949 has 8 divisors (see below), whose sum is σ = 18789792. Its totient is φ = 7829040.

The previous prime is 12917939. The next prime is 12917959. The reversal of 12917949 is 94971921.

It is an interprime number because it is at equal distance from previous prime (12917939) and next prime (12917959).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12917949 - 2⁸ = 12917693 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12917949.

It is a congruent 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 (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195694 + ... + 195759.

It is an arithmetic number, because the mean of its divisors is an integer number (2348724).

Almost surely, 2^12917949 is an apocalyptic number.

It is an amenable number.

12917949 is a deficient number, since it is larger than the sum of its proper divisors (5871843).

12917949 is a wasteful number, since it uses less digits than its factorization.

12917949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391467.

The product of its digits is 40824, while the sum is 42.

The square root of 12917949 is about 3594.1548380669. The cubic root of 12917949 is about 234.6377336685.

The spelling of 12917949 in words is "twelve million, nine hundred seventeen thousand, nine hundred forty-nine".