2783879 has 4 divisors (see below), whose sum is σ = 3181584. Its totient is φ = 2386176.

The previous prime is 2783873. The next prime is 2783887. The reversal of 2783879 is 9783872.

It is a happy number.

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 2783879 - 2¹² = 2779783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2783873) 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, 198842 + ... + 198855.

It is an arithmetic number, because the mean of its divisors is an integer number (795396).

2^2783879 is an apocalyptic number.

2783879 is a deficient number, since it is larger than the sum of its proper divisors (397705).

2783879 is an equidigital number, since it uses as much as digits as its factorization.

2783879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397704.

The product of its digits is 169344, while the sum is 44.

The square root of 2783879 is about 1668.4960293630. The cubic root of 2783879 is about 140.6749550258.

The spelling of 2783879 in words is "two million, seven hundred eighty-three thousand, eight hundred seventy-nine".