12779039 has 24 divisors (see below), whose sum is σ = 16642080. Its totient is φ = 9554112.

The previous prime is 12779029. The next prime is 12779047. The reversal of 12779039 is 93097721.

It is a de Polignac number, because none of the positive numbers 2^k-12779039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12778993 and 12779011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12779029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32657 + ... + 33045.

It is an arithmetic number, because the mean of its divisors is an integer number (693420).

Almost surely, 2^12779039 is an apocalyptic number.

12779039 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12779039 is a deficient number, since it is larger than the sum of its proper divisors (3863041).

12779039 is a wasteful number, since it uses less digits than its factorization.

12779039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 12779039 is about 3574.7781749362. The cubic root of 12779039 is about 233.7936610941.

The spelling of 12779039 in words is "twelve million, seven hundred seventy-nine thousand, thirty-nine".