172047205 has 8 divisors (see below), whose sum is σ = 225225504. Its totient is φ = 125125200.

The previous prime is 172047163. The next prime is 172047217. The reversal of 172047205 is 502740271.

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

It is not a de Polignac number, because 172047205 - 2¹¹ = 172045157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 1564011 + ... + 1564120.

It is an arithmetic number, because the mean of its divisors is an integer number (28153188).

Almost surely, 2^172047205 is an apocalyptic number.

It is an amenable number.

172047205 is a deficient number, since it is larger than the sum of its proper divisors (53178299).

172047205 is a wasteful number, since it uses less digits than its factorization.

172047205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3128147.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 172047205 is about 13116.6765988950. The cubic root of 172047205 is about 556.1806481732.

Adding to 172047205 its reverse (502740271), we get a palindrome (674787476).

The spelling of 172047205 in words is "one hundred seventy-two million, forty-seven thousand, two hundred five".