12920679 has 6 divisors (see below), whose sum is σ = 18663216. Its totient is φ = 8613780.

The previous prime is 12920671. The next prime is 12920681. The reversal of 12920679 is 97602921.

It is not a de Polignac number, because 12920679 - 2³ = 12920671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12920671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 717807 + ... + 717824.

It is an arithmetic number, because the mean of its divisors is an integer number (3110536).

Almost surely, 2^12920679 is an apocalyptic number.

12920679 is a deficient number, since it is larger than the sum of its proper divisors (5742537).

12920679 is a wasteful number, since it uses less digits than its factorization.

12920679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435637 (or 1435634 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 12920679 is about 3594.5346013079. The cubic root of 12920679 is about 234.6542614701.

The spelling of 12920679 in words is "twelve million, nine hundred twenty thousand, six hundred seventy-nine".