2103663 has 4 divisors (see below), whose sum is σ = 2804888. Its totient is φ = 1402440.

The previous prime is 2103653. The next prime is 2103667. The reversal of 2103663 is 3663012.

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

It is not a de Polignac number, because 2103663 - 2⁸ = 2103407 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103667) 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, 350608 + ... + 350613.

It is an arithmetic number, because the mean of its divisors is an integer number (701222).

2^2103663 is an apocalyptic number.

2103663 is a deficient number, since it is larger than the sum of its proper divisors (701225).

2103663 is an equidigital number, since it uses as much as digits as its factorization.

2103663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701224.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 2103663 is about 1450.4009790399. The cubic root of 2103663 is about 128.1323297809.

Adding to 2103663 its reverse (3663012), we get a palindrome (5766675).

The spelling of 2103663 in words is "two million, one hundred three thousand, six hundred sixty-three".