171144137 has 4 divisors (see below), whose sum is σ = 171403716. Its totient is φ = 170884560.

The previous prime is 171144133. The next prime is 171144157. The reversal of 171144137 is 731441171.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121638841 + 49505296 = 11029^2 + 7036^2 .

It is a cyclic number.

It is not a de Polignac number, because 171144137 - 2² = 171144133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171144131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128798 + ... + 130119.

It is an arithmetic number, because the mean of its divisors is an integer number (42850929).

Almost surely, 2^171144137 is an apocalyptic number.

It is an amenable number.

171144137 is a deficient number, since it is larger than the sum of its proper divisors (259579).

171144137 is an equidigital number, since it uses as much as digits as its factorization.

171144137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259578.

The product of its digits is 2352, while the sum is 29.

The square root of 171144137 is about 13082.2068856902. The cubic root of 171144137 is about 555.2058182074.

The spelling of 171144137 in words is "one hundred seventy-one million, one hundred forty-four thousand, one hundred thirty-seven".