171201109 has 8 divisors (see below), whose sum is σ = 176227128. Its totient is φ = 166196160.

The previous prime is 171201083. The next prime is 171201139. The reversal of 171201109 is 901102171.

It can be written as a sum of positive squares in 4 ways, for example, as 31606884 + 139594225 = 5622^2 + 11815^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 171201109 - 2⁹ = 171200597 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 171201109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171201139) 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, 12039 + ... + 22075.

It is an arithmetic number, because the mean of its divisors is an integer number (22028391).

Almost surely, 2^171201109 is an apocalyptic number.

It is an amenable number.

171201109 is a deficient number, since it is larger than the sum of its proper divisors (5026019).

171201109 is a wasteful number, since it uses less digits than its factorization.

171201109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10535.

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 171201109 is about 13084.3841658673. The cubic root of 171201109 is about 555.2674186751.

The spelling of 171201109 in words is "one hundred seventy-one million, two hundred one thousand, one hundred nine".