2783979 has 24 divisors (see below), whose sum is σ = 4468464. Its totient is φ = 1656000.

The previous prime is 2783959. The next prime is 2783999. The reversal of 2783979 is 9793872.

It is an interprime number because it is at equal distance from previous prime (2783959) and next prime (2783999).

It is not a de Polignac number, because 2783979 - 2⁵ = 2783947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2783909) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5809 + ... + 6269.

It is an arithmetic number, because the mean of its divisors is an integer number (186186).

2^2783979 is an apocalyptic number.

2783979 is a deficient number, since it is larger than the sum of its proper divisors (1684485).

2783979 is a wasteful number, since it uses less digits than its factorization.

2783979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539 (or 536 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 2783979 is about 1668.5259962014. The cubic root of 2783979 is about 140.6766394054.

The spelling of 2783979 in words is "two million, seven hundred eighty-three thousand, nine hundred seventy-nine".