11109779 has 4 divisors (see below), whose sum is σ = 11117784. Its totient is φ = 11101776.

The previous prime is 11109767. The next prime is 11109793. The reversal of 11109779 is 97790111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 97790111 = 1151 ⋅84961.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11109779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11109079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1322 + ... + 4895.

It is an arithmetic number, because the mean of its divisors is an integer number (2779446).

Almost surely, 2^11109779 is an apocalyptic number.

11109779 is a deficient number, since it is larger than the sum of its proper divisors (8005).

11109779 is an equidigital number, since it uses as much as digits as its factorization.

11109779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8004.

The product of its (nonzero) digits is 3969, while the sum is 35.

The square root of 11109779 is about 3333.1335106773. The cubic root of 11109779 is about 223.1353987469.

The spelling of 11109779 in words is "eleven million, one hundred nine thousand, seven hundred seventy-nine".