2162779 has 4 divisors (see below), whose sum is σ = 2165776. Its totient is φ = 2159784.

The previous prime is 2162747. The next prime is 2162803. The reversal of 2162779 is 9772612.

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.

It is a cyclic number.

It is not a de Polignac number, because 2162779 - 2⁵ = 2162747 is a prime.

It is a super-2 number, since 2×2162779² = 9355226005682, which contains 22 as substring.

It is a Duffinian number.

2162779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2162579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322 + ... + 2104.

It is an arithmetic number, because the mean of its divisors is an integer number (541444).

2^2162779 is an apocalyptic number.

2162779 is a deficient number, since it is larger than the sum of its proper divisors (2997).

2162779 is a wasteful number, since it uses less digits than its factorization.

2162779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996.

The product of its digits is 10584, while the sum is 34.

The square root of 2162779 is about 1470.6389767717. The cubic root of 2162779 is about 129.3214944407.

The spelling of 2162779 in words is "two million, one hundred sixty-two thousand, seven hundred seventy-nine".