172423 has 2 divisors, whose sum is σ = 172424. Its totient is φ = 172422.

The previous prime is 172421. The next prime is 172427. The reversal of 172423 is 324271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172423 - 2¹ = 172421 is a prime.

Together with 172421, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 172423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86211 + 86212.

It is an arithmetic number, because the mean of its divisors is an integer number (86212).

2¹⁷²⁴²³ is an apocalyptic number.

172423 is a deficient number, since it is larger than the sum of its proper divisors (1).

172423 is an equidigital number, since it uses as much as digits as its factorization.

172423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336, while the sum is 19.

The square root of 172423 is about 415.2384856923. The cubic root of 172423 is about 55.6585300517.

Adding to 172423 its reverse (324271), we get a palindrome (496694).

It can be divided in two parts, 172 and 423, that added together give a palindrome (595).

The spelling of 172423 in words is "one hundred seventy-two thousand, four hundred twenty-three", and thus it is an iban number.