171988353 has 24 divisors (see below), whose sum is σ = 259703808. Its totient is φ = 113735664.

The previous prime is 171988351. The next prime is 171988387. The reversal of 171988353 is 353889171.

It is not a de Polignac number, because 171988353 - 2¹ = 171988351 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 171988299 and 171988308.

It is not an unprimeable number, because it can be changed into a prime (171988351) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28075 + ... + 33647.

It is an arithmetic number, because the mean of its divisors is an integer number (10820992).

Almost surely, 2^171988353 is an apocalyptic number.

It is an amenable number.

171988353 is a deficient number, since it is larger than the sum of its proper divisors (87715455).

171988353 is an equidigital number, since it uses as much as digits as its factorization.

171988353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5715 (or 5703 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 171988353 is about 13114.4330033746. The cubic root of 171988353 is about 556.1172235713.

The spelling of 171988353 in words is "one hundred seventy-one million, nine hundred eighty-eight thousand, three hundred fifty-three".