12975979 has 4 divisors (see below), whose sum is σ = 13540176. Its totient is φ = 12411784.

The previous prime is 12975961. The next prime is 12975983. The reversal of 12975979 is 97957921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97957921 = 1667 ⋅58763.

It is a cyclic number.

It is not a de Polignac number, because 12975979 - 2⁹ = 12975467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12975679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 282064 + ... + 282109.

It is an arithmetic number, because the mean of its divisors is an integer number (3385044).

Almost surely, 2^12975979 is an apocalyptic number.

12975979 is a deficient number, since it is larger than the sum of its proper divisors (564197).

12975979 is an equidigital number, since it uses as much as digits as its factorization.

12975979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564196.

The product of its digits is 357210, while the sum is 49.

The square root of 12975979 is about 3602.2186219051. The cubic root of 12975979 is about 234.9885553503.

The spelling of 12975979 in words is "twelve million, nine hundred seventy-five thousand, nine hundred seventy-nine".