171994943 has 8 divisors (see below), whose sum is σ = 179621088. Its totient is φ = 164381184.

The previous prime is 171994931. The next prime is 171994997. The reversal of 171994943 is 349499171.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 171994943 - 2⁸ = 171994687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171994843) 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, 35855 + ... + 40367.

It is an arithmetic number, because the mean of its divisors is an integer number (22452636).

Almost surely, 2^171994943 is an apocalyptic number.

171994943 is a deficient number, since it is larger than the sum of its proper divisors (7626145).

171994943 is a wasteful number, since it uses less digits than its factorization.

171994943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6193.

The product of its digits is 244944, while the sum is 47.

The square root of 171994943 is about 13114.6842508693. The cubic root of 171994943 is about 556.1243263113.

The spelling of 171994943 in words is "one hundred seventy-one million, nine hundred ninety-four thousand, nine hundred forty-three".