73403 has 4 divisors (see below), whose sum is σ = 80088. Its totient is φ = 66720.

The previous prime is 73387. The next prime is 73417. The reversal of 73403 is 30437.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30437 = 11 ⋅2767.

It is a cyclic number.

It is not a de Polignac number, because 73403 - 2⁴ = 73387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73433) 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, 3326 + ... + 3347.

It is an arithmetic number, because the mean of its divisors is an integer number (20022).

2⁷³⁴⁰³ is an apocalyptic number.

73403 is a deficient number, since it is larger than the sum of its proper divisors (6685).

73403 is a wasteful number, since it uses less digits than its factorization.

73403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6684.

The product of its (nonzero) digits is 252, while the sum is 17.

The square root of 73403 is about 270.9298802273. The cubic root of 73403 is about 41.8701583472.

The spelling of 73403 in words is "seventy-three thousand, four hundred three", and thus it is an iban number.