1663103 has 4 divisors (see below), whose sum is σ = 1791048. Its totient is φ = 1535160.

The previous prime is 1663099. The next prime is 1663117. The reversal of 1663103 is 3013661.

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

It is a cyclic number.

It is not a de Polignac number, because 1663103 - 2² = 1663099 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 (1663133) 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, 63953 + ... + 63978.

It is an arithmetic number, because the mean of its divisors is an integer number (447762).

2^1663103 is an apocalyptic number.

1663103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1663103 is a deficient number, since it is larger than the sum of its proper divisors (127945).

1663103 is a wasteful number, since it uses less digits than its factorization.

1663103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127944.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 1663103 is about 1289.6135079938. The cubic root of 1663103 is about 118.4785459686.

Adding to 1663103 its reverse (3013661), we get a palindrome (4676764).

The spelling of 1663103 in words is "one million, six hundred sixty-three thousand, one hundred three".