2779871 has 4 divisors (see below), whose sum is σ = 2926200. Its totient is φ = 2633544.

The previous prime is 2779859. The next prime is 2779873. The reversal of 2779871 is 1789772.

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 2779871 - 2⁶ = 2779807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2779873) 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, 73136 + ... + 73173.

It is an arithmetic number, because the mean of its divisors is an integer number (731550).

2^2779871 is an apocalyptic number.

2779871 is a deficient number, since it is larger than the sum of its proper divisors (146329).

2779871 is a wasteful number, since it uses less digits than its factorization.

2779871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146328.

The product of its digits is 49392, while the sum is 41.

The square root of 2779871 is about 1667.2945150752. The cubic root of 2779871 is about 140.6074118579.

Subtracting from 2779871 its reverse (1789772), we obtain a palindrome (990099).

The spelling of 2779871 in words is "two million, seven hundred seventy-nine thousand, eight hundred seventy-one".