1673403 has 4 divisors (see below), whose sum is σ = 2231208. Its totient is φ = 1115600.

The previous prime is 1673401. The next prime is 1673407. The reversal of 1673403 is 3043761.

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 1673403 - 2¹ = 1673401 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1673401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278898 + ... + 278903.

It is an arithmetic number, because the mean of its divisors is an integer number (557802).

2^1673403 is an apocalyptic number.

1673403 is a deficient number, since it is larger than the sum of its proper divisors (557805).

1673403 is an equidigital number, since it uses as much as digits as its factorization.

1673403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557804.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 1673403 is about 1293.6007884970. The cubic root of 1673403 is about 118.7226315506.

It can be divided in two parts, 167 and 3403, that added together give a triangular number (3570 = T₈₄).

The spelling of 1673403 in words is "one million, six hundred seventy-three thousand, four hundred three".