11147779 has 2 divisors, whose sum is σ = 11147780. Its totient is φ = 11147778.

The previous prime is 11147761. The next prime is 11147783. The reversal of 11147779 is 97774111.

It is a strong prime.

It is an emirp because it is prime and its reverse (97774111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11147779 - 2⁹ = 11147267 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (11147729) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5573889 + 5573890.

It is an arithmetic number, because the mean of its divisors is an integer number (5573890).

Almost surely, 2^11147779 is an apocalyptic number.

11147779 is a deficient number, since it is larger than the sum of its proper divisors (1).

11147779 is an equidigital number, since it uses as much as digits as its factorization.

11147779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12348, while the sum is 37.

The square root of 11147779 is about 3338.8289863364. The cubic root of 11147779 is about 223.3895140957.

It can be divided in two parts, 111477 and 79, that added together give a square (111556 = 334²).

The spelling of 11147779 in words is "eleven million, one hundred forty-seven thousand, seven hundred seventy-nine".