172057389 has 8 divisors (see below), whose sum is σ = 262182720. Its totient is φ = 98318496.

The previous prime is 172057387. The next prime is 172057433. The reversal of 172057389 is 983750271.

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

It is not a de Polignac number, because 172057389 - 2¹ = 172057387 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 172057389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172057387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4096584 + ... + 4096625.

It is an arithmetic number, because the mean of its divisors is an integer number (32772840).

Almost surely, 2^172057389 is an apocalyptic number.

It is an amenable number.

172057389 is a deficient number, since it is larger than the sum of its proper divisors (90125331).

172057389 is an equidigital number, since it uses as much as digits as its factorization.

172057389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8193219.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 172057389 is about 13117.0648012427. The cubic root of 172057389 is about 556.1916219676.

It can be divided in two parts, 17 and 2057389, that added together give a triangular number (2057406 = T₂₀₂₈).

The spelling of 172057389 in words is "one hundred seventy-two million, fifty-seven thousand, three hundred eighty-nine".