12979717 has 4 divisors (see below), whose sum is σ = 13662880. Its totient is φ = 12296556.

The previous prime is 12979697. The next prime is 12979727. The reversal of 12979717 is 71797921.

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 an emirpimes, since its reverse is a distinct semiprime: 71797921 = 13 ⋅5522917.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12979717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12979727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341553 + ... + 341590.

It is an arithmetic number, because the mean of its divisors is an integer number (3415720).

Almost surely, 2^12979717 is an apocalyptic number.

It is an amenable number.

12979717 is a deficient number, since it is larger than the sum of its proper divisors (683163).

12979717 is an equidigital number, since it uses as much as digits as its factorization.

12979717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683162.

The product of its digits is 55566, while the sum is 43.

The square root of 12979717 is about 3602.7374314540. The cubic root of 12979717 is about 235.0111176270.

The spelling of 12979717 in words is "twelve million, nine hundred seventy-nine thousand, seven hundred seventeen".