172943 has 4 divisors (see below), whose sum is σ = 174168. Its totient is φ = 171720.

The previous prime is 172933. The next prime is 172969. The reversal of 172943 is 349271.

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 172943 - 2⁸ = 172687 is a prime.

It is an Ulam 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 (172933) 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, 368 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (43542).

2¹⁷²⁹⁴³ is an apocalyptic number.

172943 is a deficient number, since it is larger than the sum of its proper divisors (1225).

172943 is a wasteful number, since it uses less digits than its factorization.

172943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1224.

The product of its digits is 1512, while the sum is 26.

The square root of 172943 is about 415.8641605140. The cubic root of 172943 is about 55.7144262856.

It can be divided in two parts, 1729 and 43, that multiplied together give a palindrome (74347).

The spelling of 172943 in words is "one hundred seventy-two thousand, nine hundred forty-three".