172044071 has 4 divisors (see below), whose sum is σ = 179524272. Its totient is φ = 164563872.

The previous prime is 172044011. The next prime is 172044073. The reversal of 172044071 is 170440271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 170440271 = 139 ⋅1226189.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-172044071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 172044071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172044073) 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 3 ways as a sum of consecutive naturals, for example, 3740066 + ... + 3740111.

It is an arithmetic number, because the mean of its divisors is an integer number (44881068).

Almost surely, 2^172044071 is an apocalyptic number.

172044071 is a deficient number, since it is larger than the sum of its proper divisors (7480201).

172044071 is an equidigital number, since it uses as much as digits as its factorization.

172044071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7480200.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 172044071 is about 13116.5571321136. The cubic root of 172044071 is about 556.1772710366.

The spelling of 172044071 in words is "one hundred seventy-two million, forty-four thousand, seventy-one".