73003 has 4 divisors (see below), whose sum is σ = 83440. Its totient is φ = 62568.

The previous prime is 72997. The next prime is 73009. The reversal of 73003 is 30037.

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

It is an interprime number because it is at equal distance from previous prime (72997) and next prime (73009).

It is a cyclic number.

It is not a de Polignac number, because 73003 - 2¹³ = 64811 is a prime.

73003 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (73009) 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, 5208 + ... + 5221.

It is an arithmetic number, because the mean of its divisors is an integer number (20860).

2⁷³⁰⁰³ is an apocalyptic number.

73003 is a deficient number, since it is larger than the sum of its proper divisors (10437).

73003 is a wasteful number, since it uses less digits than its factorization.

73003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10436.

The product of its (nonzero) digits is 63, while the sum is 13.

The square root of 73003 is about 270.1906734142. The cubic root of 73003 is about 41.7939644682.

The spelling of 73003 in words is "seventy-three thousand, three", and thus it is an iban number.