172001289 has 8 divisors (see below), whose sum is σ = 229405120. Its totient is φ = 114632496.

The previous prime is 172001287. The next prime is 172001293. The reversal of 172001289 is 982100271.

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

It is not a de Polignac number, because 172001289 - 2¹ = 172001287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172001287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6492 + ... + 19650.

It is an arithmetic number, because the mean of its divisors is an integer number (28675640).

Almost surely, 2^172001289 is an apocalyptic number.

It is an amenable number.

172001289 is a deficient number, since it is larger than the sum of its proper divisors (57403831).

172001289 is a wasteful number, since it uses less digits than its factorization.

172001289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17519.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 172001289 is about 13114.9261911762. The cubic root of 172001289 is about 556.1311658953.

The spelling of 172001289 in words is "one hundred seventy-two million, one thousand, two hundred eighty-nine".