2220779 has 4 divisors (see below), whose sum is σ = 2422680. Its totient is φ = 2018880.

The previous prime is 2220773. The next prime is 2220787. The reversal of 2220779 is 9770222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2220779 is a prime.

It is a pancake number, because a pancake can be divided into 2220779 parts by 2107 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2220773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100934 + ... + 100955.

It is an arithmetic number, because the mean of its divisors is an integer number (605670).

2^2220779 is an apocalyptic number.

2220779 is a deficient number, since it is larger than the sum of its proper divisors (201901).

2220779 is a wasteful number, since it uses less digits than its factorization.

2220779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201900.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 2220779 is about 1490.2278349299. The cubic root of 2220779 is about 130.4673318012.

The spelling of 2220779 in words is "two million, two hundred twenty thousand, seven hundred seventy-nine".