171620171 has 8 divisors (see below), whose sum is σ = 180010560. Its totient is φ = 163427328.

The previous prime is 171620161. The next prime is 171620191. The reversal of 171620171 is 171026171.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-171620171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 171620171.

It is not an unprimeable number, because it can be changed into a prime (171620101) 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, 47606 + ... + 51083.

It is an arithmetic number, because the mean of its divisors is an integer number (22501320).

Almost surely, 2^171620171 is an apocalyptic number.

171620171 is a deficient number, since it is larger than the sum of its proper divisors (8390389).

171620171 is an equidigital number, since it uses as much as digits as its factorization.

171620171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98773.

The product of its (nonzero) digits is 588, while the sum is 26.

The square root of 171620171 is about 13100.3882003550. The cubic root of 171620171 is about 555.7201063070.

The spelling of 171620171 in words is "one hundred seventy-one million, six hundred twenty thousand, one hundred seventy-one".