12479639 has 12 divisors (see below), whose sum is σ = 13484352. Its totient is φ = 11536800.

The previous prime is 12479633. The next prime is 12479647. The reversal of 12479639 is 93697421.

It is a de Polignac number, because none of the positive numbers 2^k-12479639 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12479596 and 12479605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12479633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16019 + ... + 16779.

It is an arithmetic number, because the mean of its divisors is an integer number (1123696).

Almost surely, 2^12479639 is an apocalyptic number.

12479639 is a deficient number, since it is larger than the sum of its proper divisors (1004713).

12479639 is an equidigital number, since it uses as much as digits as its factorization.

12479639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838 (or 815 counting only the distinct ones).

The product of its digits is 81648, while the sum is 41.

The square root of 12479639 is about 3532.6532521605. The cubic root of 12479639 is about 231.9533633467.

The spelling of 12479639 in words is "twelve million, four hundred seventy-nine thousand, six hundred thirty-nine".