2783813 has 4 divisors (see below), whose sum is σ = 2788320. Its totient is φ = 2779308.

The previous prime is 2783789. The next prime is 2783821. The reversal of 2783813 is 3183872.

2783813 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 2783813 - 2⁶ = 2783749 is a prime.

It is a super-2 number, since 2×2783813² = 15499229637938, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2783813.

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 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, 1145 + ... + 2622.

It is an arithmetic number, because the mean of its divisors is an integer number (697080).

2^2783813 is an apocalyptic number.

It is an amenable number.

2783813 is a deficient number, since it is larger than the sum of its proper divisors (4507).

2783813 is an equidigital number, since it uses as much as digits as its factorization.

2783813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4506.

The product of its digits is 8064, while the sum is 32.

The square root of 2783813 is about 1668.4762509547. The cubic root of 2783813 is about 140.6738433131.

The spelling of 2783813 in words is "two million, seven hundred eighty-three thousand, eight hundred thirteen".