172303 has 4 divisors (see below), whose sum is σ = 175608. Its totient is φ = 169000.

The previous prime is 172297. The next prime is 172307. The reversal of 172303 is 303271.

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 172303 - 2¹⁷ = 41231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172307) 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, 1573 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (43902).

2¹⁷²³⁰³ is an apocalyptic number.

172303 is a deficient number, since it is larger than the sum of its proper divisors (3305).

172303 is an equidigital number, since it uses as much as digits as its factorization.

172303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3304.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 172303 is about 415.0939652657. The cubic root of 172303 is about 55.6456149656.

Adding to 172303 its reverse (303271), we get a palindrome (475574).

The spelling of 172303 in words is "one hundred seventy-two thousand, three hundred three", and thus it is an iban number.