2193639 has 8 divisors (see below), whose sum is σ = 3342720. Its totient is φ = 1253496.

The previous prime is 2193637. The next prime is 2193641. The reversal of 2193639 is 9363912.

It is an interprime number because it is at equal distance from previous prime (2193637) and next prime (2193641).

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

It is not a de Polignac number, because 2193639 - 2¹ = 2193637 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 9⁴ + 3¹² + 6³ + 3¹³ + 9⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52209 + ... + 52250.

It is an arithmetic number, because the mean of its divisors is an integer number (417840).

2^2193639 is an apocalyptic number.

2193639 is a deficient number, since it is larger than the sum of its proper divisors (1149081).

2193639 is a wasteful number, since it uses less digits than its factorization.

2193639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104469.

The product of its digits is 8748, while the sum is 33.

The square root of 2193639 is about 1481.0938525293. The cubic root of 2193639 is about 129.9336742533.

The spelling of 2193639 in words is "two million, one hundred ninety-three thousand, six hundred thirty-nine".