171131389 has 12 divisors (see below), whose sum is σ = 202574428. Its totient is φ = 143605440.

The previous prime is 171131369. The next prime is 171131393. The reversal of 171131389 is 983131171.

171131389 = T₁₅₂ + T₁₅₃ + ... + T₁₀₀₉.

It can be written as a sum of positive squares in 2 ways, for example, as 63075364 + 108056025 = 7942^2 + 10395^2 .

It is not a de Polignac number, because 171131389 - 2¹⁵ = 171098621 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171131369) 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, 52824 + ... + 55969.

Almost surely, 2^171131389 is an apocalyptic number.

It is an amenable number.

171131389 is a deficient number, since it is larger than the sum of its proper divisors (31443039).

171131389 is a wasteful number, since it uses less digits than its factorization.

171131389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108828 (or 108817 counting only the distinct ones).

The product of its digits is 4536, while the sum is 34.

The square root of 171131389 is about 13081.7196499543. The cubic root of 171131389 is about 555.1920326743.

The spelling of 171131389 in words is "one hundred seventy-one million, one hundred thirty-one thousand, three hundred eighty-nine".