12279817 has 4 divisors (see below), whose sum is σ = 13396176. Its totient is φ = 11163460.

The previous prime is 12279803. The next prime is 12279829. The reversal of 12279817 is 71897221.

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: 71897221 = 11 ⋅6536111.

It is a de Polignac number, because none of the positive numbers 2^k-12279817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12279877) 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, 558163 + ... + 558184.

It is an arithmetic number, because the mean of its divisors is an integer number (3349044).

Almost surely, 2^12279817 is an apocalyptic number.

It is an amenable number.

12279817 is a deficient number, since it is larger than the sum of its proper divisors (1116359).

12279817 is a wasteful number, since it uses less digits than its factorization.

12279817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1116358.

The product of its digits is 14112, while the sum is 37.

The square root of 12279817 is about 3504.2569825856. The cubic root of 12279817 is about 230.7086962276.

The spelling of 12279817 in words is "twelve million, two hundred seventy-nine thousand, eight hundred seventeen".