171889742 has 16 divisors (see below), whose sum is σ = 262066560. Its totient is φ = 84540672.

The previous prime is 171889721. The next prime is 171889769. The reversal of 171889742 is 247988171.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61859 + ... + 64577.

It is an arithmetic number, because the mean of its divisors is an integer number (16379160).

Almost surely, 2^171889742 is an apocalyptic number.

171889742 is a deficient number, since it is larger than the sum of its proper divisors (90176818).

171889742 is a wasteful number, since it uses less digits than its factorization.

171889742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3227.

The product of its digits is 225792, while the sum is 47.

The square root of 171889742 is about 13110.6728278910. The cubic root of 171889742 is about 556.0109183888.

The spelling of 171889742 in words is "one hundred seventy-one million, eight hundred eighty-nine thousand, seven hundred forty-two".