171099 has 8 divisors (see below), whose sum is σ = 253520. Its totient is φ = 114048.

The previous prime is 171091. The next prime is 171103. The reversal of 171099 is 990171.

171099 is nontrivially palindromic in base 6.

It is not a de Polignac number, because 171099 - 2³ = 171091 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 6337 = 171099 / (1 + 7 + 1 + 0 + 9 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171091) 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, 3142 + ... + 3195.

It is an arithmetic number, because the mean of its divisors is an integer number (31690).

2¹⁷¹⁰⁹⁹ is an apocalyptic number.

171099 is a deficient number, since it is larger than the sum of its proper divisors (82421).

171099 is an equidigital number, since it uses as much as digits as its factorization.

171099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6346 (or 6340 counting only the distinct ones).

The product of its (nonzero) digits is 567, while the sum is 27.

The square root of 171099 is about 413.6411488235. The cubic root of 171099 is about 55.5157004521.

The spelling of 171099 in words is "one hundred seventy-one thousand, ninety-nine".