171089639 has 8 divisors (see below), whose sum is σ = 195717120. Its totient is φ = 146508696.

The previous prime is 171089629. The next prime is 171089669. The reversal of 171089639 is 936980171.

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 171089639 - 2¹² = 171085543 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 171089639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171089609) 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, 3359 + ... + 18800.

It is an arithmetic number, because the mean of its divisors is an integer number (24464640).

Almost surely, 2^171089639 is an apocalyptic number.

171089639 is a deficient number, since it is larger than the sum of its proper divisors (24627481).

171089639 is a wasteful number, since it uses less digits than its factorization.

171089639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23269.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 171089639 is about 13080.1238143987. The cubic root of 171089639 is about 555.1468799357.

The spelling of 171089639 in words is "one hundred seventy-one million, eighty-nine thousand, six hundred thirty-nine".