12147979 has 8 divisors (see below), whose sum is σ = 13422240. Its totient is φ = 10935936.

The previous prime is 12147959. The next prime is 12147983. The reversal of 12147979 is 97974121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12147979 - 2¹⁵ = 12115211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12147959) 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 7 ways as a sum of consecutive naturals, for example, 15144 + ... + 15925.

It is an arithmetic number, because the mean of its divisors is an integer number (1677780).

Almost surely, 2^12147979 is an apocalyptic number.

12147979 is a deficient number, since it is larger than the sum of its proper divisors (1274261).

12147979 is a wasteful number, since it uses less digits than its factorization.

12147979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31109.

The product of its digits is 31752, while the sum is 40.

The square root of 12147979 is about 3485.3950995547. The cubic root of 12147979 is about 229.8800824157.

The spelling of 12147979 in words is "twelve million, one hundred forty-seven thousand, nine hundred seventy-nine".