2819993 has 4 divisors (see below), whose sum is σ = 3076368. Its totient is φ = 2563620.

The previous prime is 2819987. The next prime is 2820001. The reversal of 2819993 is 3999182.

2819993 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 a de Polignac number, because none of the positive numbers 2^k-2819993 is a prime.

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 2819993.

It is not an unprimeable number, because it can be changed into a prime (2819903) 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, 128171 + ... + 128192.

It is an arithmetic number, because the mean of its divisors is an integer number (769092).

2^2819993 is an apocalyptic number.

It is an amenable number.

2819993 is a deficient number, since it is larger than the sum of its proper divisors (256375).

2819993 is a wasteful number, since it uses less digits than its factorization.

2819993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256374.

The product of its digits is 34992, while the sum is 41.

The square root of 2819993 is about 1679.2834781537. The cubic root of 2819993 is about 141.2806475383.

The spelling of 2819993 in words is "two million, eight hundred nineteen thousand, nine hundred ninety-three".