11131979 has 2 divisors, whose sum is σ = 11131980. Its totient is φ = 11131978.

The previous prime is 11131927. The next prime is 11131999. The reversal of 11131979 is 97913111.

It is a strong prime.

It is an emirp because it is prime and its reverse (97913111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11131979 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (11131999) 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, 5565989 + 5565990.

It is an arithmetic number, because the mean of its divisors is an integer number (5565990).

Almost surely, 2^11131979 is an apocalyptic number.

11131979 is a deficient number, since it is larger than the sum of its proper divisors (1).

11131979 is an equidigital number, since it uses as much as digits as its factorization.

11131979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1701, while the sum is 32.

The square root of 11131979 is about 3336.4620483380. The cubic root of 11131979 is about 223.2839258543.

The spelling of 11131979 in words is "eleven million, one hundred thirty-one thousand, nine hundred seventy-nine".