2113663 has 4 divisors (see below), whose sum is σ = 2134288. Its totient is φ = 2093040.

The previous prime is 2113651. The next prime is 2113667. The reversal of 2113663 is 3663112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2113663 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 (2113667) 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, 10158 + ... + 10363.

It is an arithmetic number, because the mean of its divisors is an integer number (533572).

2^2113663 is an apocalyptic number.

2113663 is a deficient number, since it is larger than the sum of its proper divisors (20625).

2113663 is a wasteful number, since it uses less digits than its factorization.

2113663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20624.

The product of its digits is 648, while the sum is 22.

The square root of 2113663 is about 1453.8442144879. The cubic root of 2113663 is about 128.3350394256.

Adding to 2113663 its reverse (3663112), we get a palindrome (5776775).

The spelling of 2113663 in words is "two million, one hundred thirteen thousand, six hundred sixty-three".