171988123 has 8 divisors (see below), whose sum is σ = 174047328. Its totient is φ = 169941504.

The previous prime is 171988039. The next prime is 171988177. The reversal of 171988123 is 321889171.

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 171988123 - 2¹³ = 171979931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (171988423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25915 + ... + 31867.

It is an arithmetic number, because the mean of its divisors is an integer number (21755916).

Almost surely, 2^171988123 is an apocalyptic number.

171988123 is a deficient number, since it is larger than the sum of its proper divisors (2059205).

171988123 is a wasteful number, since it uses less digits than its factorization.

171988123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6293.

The product of its digits is 24192, while the sum is 40.

The square root of 171988123 is about 13114.4242344069. The cubic root of 171988123 is about 556.1169756727.

The spelling of 171988123 in words is "one hundred seventy-one million, nine hundred eighty-eight thousand, one hundred twenty-three".