1683003 has 18 divisors (see below), whose sum is σ = 2634996. Its totient is φ = 952728.

The previous prime is 1682999. The next prime is 1683007. The reversal of 1683003 is 3003861.

It is an interprime number because it is at equal distance from previous prime (1682999) and next prime (1683007).

It is not a de Polignac number, because 1683003 - 2² = 1682999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an Ulam number.

1683003 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1683007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 15676 + ... + 15782.

2^1683003 is an apocalyptic number.

1683003 is a deficient number, since it is larger than the sum of its proper divisors (951993).

1683003 is an equidigital number, since it uses as much as digits as its factorization.

1683003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1683003 is about 1297.3060548691. The cubic root of 1683003 is about 118.9492286298.

Multiplying 1683003 by its product of nonzero digits (432), we get a square (727057296 = 26964²).

Adding to 1683003 its reverse (3003861), we get a palindrome (4686864).

The spelling of 1683003 in words is "one million, six hundred eighty-three thousand, three".