2243993 has 4 divisors (see below), whose sum is σ = 2247168. Its totient is φ = 2240820.

The previous prime is 2243987. The next prime is 2244091. The reversal of 2243993 is 3993422.

2243993 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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3993422 = 2 ⋅1996711.

It is a cyclic number.

It is not a de Polignac number, because 2243993 - 2¹⁴ = 2227609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243393) 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, 8 + ... + 2118.

It is an arithmetic number, because the mean of its divisors is an integer number (561792).

2^2243993 is an apocalyptic number.

It is an amenable number.

2243993 is a deficient number, since it is larger than the sum of its proper divisors (3175).

2243993 is a wasteful number, since it uses less digits than its factorization.

2243993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3174.

The product of its digits is 11664, while the sum is 32.

The square root of 2243993 is about 1497.9963284334. The cubic root of 2243993 is about 130.9203524935.

The spelling of 2243993 in words is "two million, two hundred forty-three thousand, nine hundred ninety-three".