11979047 has 2 divisors, whose sum is σ = 11979048. Its totient is φ = 11979046.

The previous prime is 11979043. The next prime is 11979061. The reversal of 11979047 is 74097911.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11979047 - 2² = 11979043 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11979047.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11979043) 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 as a sum of consecutive naturals, namely, 5989523 + 5989524.

It is an arithmetic number, because the mean of its divisors is an integer number (5989524).

Almost surely, 2^11979047 is an apocalyptic number.

11979047 is a deficient number, since it is larger than the sum of its proper divisors (1).

11979047 is an equidigital number, since it uses as much as digits as its factorization.

11979047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 38.

The square root of 11979047 is about 3461.0759887642. The cubic root of 11979047 is about 228.8095197821.

It can be divided in two parts, 1197904 and 7, that added together give a palindrome (1197911).

The spelling of 11979047 in words is "eleven million, nine hundred seventy-nine thousand, forty-seven".