12919217 has 4 divisors (see below), whose sum is σ = 12998640. Its totient is φ = 12839796.

The previous prime is 12919211. The next prime is 12919241. The reversal of 12919217 is 71291921.

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: 71291921 = 3467 ⋅20563.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12919217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12919211) 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, 39467 + ... + 39792.

It is an arithmetic number, because the mean of its divisors is an integer number (3249660).

Almost surely, 2^12919217 is an apocalyptic number.

It is an amenable number.

12919217 is a deficient number, since it is larger than the sum of its proper divisors (79423).

12919217 is an equidigital number, since it uses as much as digits as its factorization.

12919217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79422.

The product of its digits is 2268, while the sum is 32.

The square root of 12919217 is about 3594.3312312585. The cubic root of 12919217 is about 234.6454106073.

The spelling of 12919217 in words is "twelve million, nine hundred nineteen thousand, two hundred seventeen".