173871009 has 16 divisors (see below), whose sum is σ = 277401600. Its totient is φ = 106997328.

The previous prime is 173870989. The next prime is 173871011. The reversal of 173871009 is 900178371.

173871009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 173871009 - 2⁹ = 173870497 is a prime.

It is a super-2 number, since 2×173871009² = 60462255541356162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (173871079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 247329 + ... + 248030.

It is an arithmetic number, because the mean of its divisors is an integer number (17337600).

Almost surely, 2^173871009 is an apocalyptic number.

It is an amenable number.

173871009 is a deficient number, since it is larger than the sum of its proper divisors (103530591).

173871009 is a wasteful number, since it uses less digits than its factorization.

173871009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495381 (or 495375 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 173871009 is about 13186.0156605398. The cubic root of 173871009 is about 558.1390276772.

The spelling of 173871009 in words is "one hundred seventy-three million, eight hundred seventy-one thousand, nine".