173903 has 4 divisors (see below), whose sum is σ = 181488. Its totient is φ = 166320.

The previous prime is 173897. The next prime is 173909. The reversal of 173903 is 309371.

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 (173897) and next prime (173909).

It is a cyclic number.

It is not a de Polignac number, because 173903 - 2⁶ = 173839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 7561 = 173903 / (1 + 7 + 3 + 9 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173909) 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, 3758 + ... + 3803.

It is an arithmetic number, because the mean of its divisors is an integer number (45372).

2¹⁷³⁹⁰³ is an apocalyptic number.

173903 is a deficient number, since it is larger than the sum of its proper divisors (7585).

173903 is an equidigital number, since it uses as much as digits as its factorization.

173903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7584.

The product of its (nonzero) digits is 567, while the sum is 23.

The square root of 173903 is about 417.0167862329. The cubic root of 173903 is about 55.8173256751.

The spelling of 173903 in words is "one hundred seventy-three thousand, nine hundred three".