2720779 has 4 divisors (see below), whose sum is σ = 2724120. Its totient is φ = 2717440.

The previous prime is 2720747. The next prime is 2720789. The reversal of 2720779 is 9770272.

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.

It is a cyclic number.

It is not a de Polignac number, because 2720779 - 2⁵ = 2720747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2720789) 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, 444 + ... + 2374.

It is an arithmetic number, because the mean of its divisors is an integer number (681030).

2^2720779 is an apocalyptic number.

2720779 is a deficient number, since it is larger than the sum of its proper divisors (3341).

2720779 is a wasteful number, since it uses less digits than its factorization.

2720779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340.

The product of its (nonzero) digits is 12348, while the sum is 34.

The square root of 2720779 is about 1649.4784024048. The cubic root of 2720779 is about 139.6039657825.

The spelling of 2720779 in words is "two million, seven hundred twenty thousand, seven hundred seventy-nine".