172633423 has 4 divisors (see below), whose sum is σ = 180139248. Its totient is φ = 165127600.

The previous prime is 172633421. The next prime is 172633427. The reversal of 172633423 is 324336271.

172633423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 172633423 - 2¹ = 172633421 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172633421) 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, 3752878 + ... + 3752923.

It is an arithmetic number, because the mean of its divisors is an integer number (45034812).

Almost surely, 2^172633423 is an apocalyptic number.

172633423 is a deficient number, since it is larger than the sum of its proper divisors (7505825).

172633423 is an equidigital number, since it uses as much as digits as its factorization.

172633423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7505824.

The product of its digits is 18144, while the sum is 31.

The square root of 172633423 is about 13139.0038815734. The cubic root of 172633423 is about 556.8116251904.

Adding to 172633423 its reverse (324336271), we get a palindrome (496969694).

It can be divided in two parts, 172633 and 423, that added together give a square (173056 = 416²).

The spelling of 172633423 in words is "one hundred seventy-two million, six hundred thirty-three thousand, four hundred twenty-three".