172044209 has 8 divisors (see below), whose sum is σ = 181543680. Its totient is φ = 162713056.

The previous prime is 172044179. The next prime is 172044227. The reversal of 172044209 is 902440271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172044209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172044109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39977 + ... + 44070.

It is an arithmetic number, because the mean of its divisors is an integer number (22692960).

Almost surely, 2^172044209 is an apocalyptic number.

It is an amenable number.

172044209 is a deficient number, since it is larger than the sum of its proper divisors (9499471).

172044209 is an equidigital number, since it uses as much as digits as its factorization.

172044209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84159.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 172044209 is about 13116.5623926393. The cubic root of 172044209 is about 556.1774197435.

The spelling of 172044209 in words is "one hundred seventy-two million, forty-four thousand, two hundred nine".