2193903 has 12 divisors (see below), whose sum is σ = 3243240. Its totient is φ = 1428336.

The previous prime is 2193889. The next prime is 2193929. The reversal of 2193903 is 3093912.

It is not a de Polignac number, because 2193903 - 2⁴ = 2193887 is a prime.

2193903 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2193943) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2448 + ... + 3221.

It is an arithmetic number, because the mean of its divisors is an integer number (270270).

2^2193903 is an apocalyptic number.

2193903 is a deficient number, since it is larger than the sum of its proper divisors (1049337).

2193903 is a wasteful number, since it uses less digits than its factorization.

2193903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5718 (or 5715 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 2193903 is about 1481.1829731671. The cubic root of 2193903 is about 129.9388864622.

Subtracting 2193903 from its reverse (3093912), we obtain a palindrome (900009).

The spelling of 2193903 in words is "two million, one hundred ninety-three thousand, nine hundred three".