171982043 has 4 divisors (see below), whose sum is σ = 172355568. Its totient is φ = 171608520.

The previous prime is 171982033. The next prime is 171982049. The reversal of 171982043 is 340289171.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 171982043 - 2²⁰ = 170933467 is a prime.

It is a super-2 number, since 2×171982043² = 59155646228907698, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 171981994 and 171982012.

It is not an unprimeable number, because it can be changed into a prime (171982049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186071 + ... + 186992.

It is an arithmetic number, because the mean of its divisors is an integer number (43088892).

Almost surely, 2^171982043 is an apocalyptic number.

171982043 is a deficient number, since it is larger than the sum of its proper divisors (373525).

171982043 is an equidigital number, since it uses as much as digits as its factorization.

171982043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373524.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 171982043 is about 13114.1924265278. The cubic root of 171982043 is about 556.1104224468.

The spelling of 171982043 in words is "one hundred seventy-one million, nine hundred eighty-two thousand, forty-three".