12998979 has 24 divisors (see below), whose sum is σ = 22394112. Its totient is φ = 7104240.

The previous prime is 12998977. The next prime is 12998981. The reversal of 12998979 is 97989921.

It is an interprime number because it is at equal distance from previous prime (12998977) and next prime (12998981).

It is not a de Polignac number, because 12998979 - 2¹ = 12998977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12998977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3037 + ... + 5934.

It is an arithmetic number, because the mean of its divisors is an integer number (933088).

Almost surely, 2^12998979 is an apocalyptic number.

12998979 is a deficient number, since it is larger than the sum of its proper divisors (9395133).

12998979 is a wasteful number, since it uses less digits than its factorization.

12998979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9007 (or 9004 counting only the distinct ones).

The product of its digits is 734832, while the sum is 54.

The square root of 12998979 is about 3605.4096854588. The cubic root of 12998979 is about 235.1273129373.

It can be divided in two parts, 12 and 998979, that added together give a triangular number (998991 = T₁₄₁₃).

The spelling of 12998979 in words is "twelve million, nine hundred ninety-eight thousand, nine hundred seventy-nine".