171627161 has 12 divisors (see below), whose sum is σ = 176596116. Its totient is φ = 166757760.

The previous prime is 171627119. The next prime is 171627199. The reversal of 171627161 is 161726171.

171627161 = 16² + 17² + ... + 801².

171627161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 99121936 + 72505225 = 9956^2 + 8515^2 .

It is not a de Polignac number, because 171627161 - 2¹⁸ = 171365017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171627761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1252685 + ... + 1252821.

It is an arithmetic number, because the mean of its divisors is an integer number (14716343).

Almost surely, 2^171627161 is an apocalyptic number.

It is an amenable number.

171627161 is a deficient number, since it is larger than the sum of its proper divisors (4968955).

171627161 is an equidigital number, since it uses as much as digits as its factorization.

171627161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 341 counting only the distinct ones).

The product of its digits is 3528, while the sum is 32.

The square root of 171627161 is about 13100.6549836258. The cubic root of 171627161 is about 555.7276509346.

The spelling of 171627161 in words is "one hundred seventy-one million, six hundred twenty-seven thousand, one hundred sixty-one".