11978979 has 8 divisors (see below), whose sum is σ = 16053840. Its totient is φ = 7945056.

The previous prime is 11978959. The next prime is 11979029. The reversal of 11978979 is 97987911.

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

It is not a de Polignac number, because 11978979 - 2⁷ = 11978851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11978959) 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, 9544 + ... + 10725.

It is an arithmetic number, because the mean of its divisors is an integer number (2006730).

Almost surely, 2^11978979 is an apocalyptic number.

11978979 is a deficient number, since it is larger than the sum of its proper divisors (4074861).

11978979 is a wasteful number, since it uses less digits than its factorization.

11978979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20469.

The product of its digits is 285768, while the sum is 51.

The square root of 11978979 is about 3461.0661652156. The cubic root of 11978979 is about 228.8090868296.

The spelling of 11978979 in words is "eleven million, nine hundred seventy-eight thousand, nine hundred seventy-nine".