172947 has 4 divisors (see below), whose sum is σ = 230600. Its totient is φ = 115296.

The previous prime is 172933. The next prime is 172969. The reversal of 172947 is 749271.

172947 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 not a de Polignac number, because 172947 - 2⁶ = 172883 is a prime.

It is a D-number.

It is a Duffinian number.

172947 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172987) 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, 28822 + ... + 28827.

It is an arithmetic number, because the mean of its divisors is an integer number (57650).

2¹⁷²⁹⁴⁷ is an apocalyptic number.

172947 is a deficient number, since it is larger than the sum of its proper divisors (57653).

172947 is an equidigital number, since it uses as much as digits as its factorization.

172947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57652.

The product of its digits is 3528, while the sum is 30.

The square root of 172947 is about 415.8689697489. The cubic root of 172947 is about 55.7148558221.

The spelling of 172947 in words is "one hundred seventy-two thousand, nine hundred forty-seven".