2779321 has 4 divisors (see below), whose sum is σ = 2783872. Its totient is φ = 2774772.

The previous prime is 2779303. The next prime is 2779327. The reversal of 2779321 is 1239772.

2779321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2779321 - 2⁵ = 2779289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2779327) 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, 1185 + ... + 2638.

It is an arithmetic number, because the mean of its divisors is an integer number (695968).

2^2779321 is an apocalyptic number.

It is an amenable number.

2779321 is a deficient number, since it is larger than the sum of its proper divisors (4551).

2779321 is an equidigital number, since it uses as much as digits as its factorization.

2779321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4550.

The product of its digits is 5292, while the sum is 31.

The square root of 2779321 is about 1667.1295690497. The cubic root of 2779321 is about 140.5981381450.

The spelling of 2779321 in words is "two million, seven hundred seventy-nine thousand, three hundred twenty-one".