12438979 has 4 divisors (see below), whose sum is σ = 14215984. Its totient is φ = 10661976.

The previous prime is 12438947. The next prime is 12438983. The reversal of 12438979 is 97983421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12438979 - 2⁵ = 12438947 is a prime.

It is a Duffinian number.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (12438079) 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, 888492 + ... + 888505.

It is an arithmetic number, because the mean of its divisors is an integer number (3553996).

Almost surely, 2^12438979 is an apocalyptic number.

12438979 is a deficient number, since it is larger than the sum of its proper divisors (1777005).

12438979 is an equidigital number, since it uses as much as digits as its factorization.

12438979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1777004.

The product of its digits is 108864, while the sum is 43.

The square root of 12438979 is about 3526.8936757436. The cubic root of 12438979 is about 231.7011796369.

The spelling of 12438979 in words is "twelve million, four hundred thirty-eight thousand, nine hundred seventy-nine".