12229979 has 4 divisors (see below), whose sum is σ = 12412584. Its totient is φ = 12047376.

The previous prime is 12229961. The next prime is 12229981. The reversal of 12229979 is 97992221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97992221 = 223 ⋅439427.

It is a cyclic number.

It is not a de Polignac number, because 12229979 - 2²⁰ = 11181403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12229079) 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, 91202 + ... + 91335.

It is an arithmetic number, because the mean of its divisors is an integer number (3103146).

Almost surely, 2^12229979 is an apocalyptic number.

12229979 is a deficient number, since it is larger than the sum of its proper divisors (182605).

12229979 is an equidigital number, since it uses as much as digits as its factorization.

12229979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182604.

The product of its digits is 40824, while the sum is 41.

The square root of 12229979 is about 3497.1386875559. The cubic root of 12229979 is about 230.3961603475.

The spelling of 12229979 in words is "twelve million, two hundred twenty-nine thousand, nine hundred seventy-nine".