2783993 has 4 divisors (see below), whose sum is σ = 2787840. Its totient is φ = 2780148.

The previous prime is 2783959. The next prime is 2783999. The reversal of 2783993 is 3993872.

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 a de Polignac number, because none of the positive numbers 2^k-2783993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2783993.

It is not an unprimeable number, because it can be changed into a prime (2783999) 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, 473 + ... + 2406.

It is an arithmetic number, because the mean of its divisors is an integer number (696960).

2^2783993 is an apocalyptic number.

It is an amenable number.

2783993 is a deficient number, since it is larger than the sum of its proper divisors (3847).

2783993 is an equidigital number, since it uses as much as digits as its factorization.

2783993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3846.

The product of its digits is 81648, while the sum is 41.

The square root of 2783993 is about 1668.5301915159. The cubic root of 2783993 is about 140.6768752153.

The spelling of 2783993 in words is "two million, seven hundred eighty-three thousand, nine hundred ninety-three".