2193865 has 8 divisors (see below), whose sum is σ = 2676168. Its totient is φ = 1726080.

The previous prime is 2193853. The next prime is 2193881. The reversal of 2193865 is 5683912.

2193865 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 131769 + 2062096 = 363^2 + 1436^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2193865 - 2⁹ = 2193353 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 2193865.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3292 + ... + 3901.

It is an arithmetic number, because the mean of its divisors is an integer number (334521).

2^2193865 is an apocalyptic number.

It is an amenable number.

2193865 is a deficient number, since it is larger than the sum of its proper divisors (482303).

2193865 is an equidigital number, since it uses as much as digits as its factorization.

2193865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7259.

The product of its digits is 12960, while the sum is 34.

The square root of 2193865 is about 1481.1701455268. The cubic root of 2193865 is about 129.9381362457.

The spelling of 2193865 in words is "two million, one hundred ninety-three thousand, eight hundred sixty-five".