171002009 has 16 divisors (see below), whose sum is σ = 182891520. Its totient is φ = 159606720.

The previous prime is 171002003. The next prime is 171002011. The reversal of 171002009 is 900200171.

It is not a de Polignac number, because 171002009 - 2⁴ = 171001993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171002003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108344 + ... + 109910.

It is an arithmetic number, because the mean of its divisors is an integer number (11430720).

Almost surely, 2^171002009 is an apocalyptic number.

It is an amenable number.

171002009 is a deficient number, since it is larger than the sum of its proper divisors (11889511).

171002009 is a wasteful number, since it uses less digits than its factorization.

171002009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1720.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 171002009 is about 13076.7736464313. The cubic root of 171002009 is about 555.0520839576.

The spelling of 171002009 in words is "one hundred seventy-one million, two thousand, nine".