11222779 has 4 divisors (see below), whose sum is σ = 11261376. Its totient is φ = 11184184.

The previous prime is 11222759. The next prime is 11222789. The reversal of 11222779 is 97722211.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 11222779 - 2²³ = 2834171 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 11222779.

It is not an unprimeable number, because it can be changed into a prime (11222759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18859 + ... + 19444.

It is an arithmetic number, because the mean of its divisors is an integer number (2815344).

Almost surely, 2^11222779 is an apocalyptic number.

11222779 is a deficient number, since it is larger than the sum of its proper divisors (38597).

11222779 is an equidigital number, since it uses as much as digits as its factorization.

11222779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38596.

The product of its digits is 3528, while the sum is 31.

The square root of 11222779 is about 3350.0416415322. The cubic root of 11222779 is about 223.8893679345.

The spelling of 11222779 in words is "eleven million, two hundred twenty-two thousand, seven hundred seventy-nine".