168331943 has 16 divisors (see below), whose sum is σ = 193122720. Its totient is φ = 146210688.

The previous prime is 168331903. The next prime is 168331951. The reversal of 168331943 is 349133861.

It is a happy number.

It is not a de Polignac number, because 168331943 - 2²⁰ = 167283367 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168331897 and 168331906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168331903) 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 15 ways as a sum of consecutive naturals, for example, 35096 + ... + 39602.

It is an arithmetic number, because the mean of its divisors is an integer number (12070170).

Almost surely, 2^168331943 is an apocalyptic number.

168331943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

168331943 is a deficient number, since it is larger than the sum of its proper divisors (24790777).

168331943 is an equidigital number, since it uses as much as digits as its factorization.

168331943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4563 (or 4537 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 168331943 is about 12974.2800570976. The cubic root of 168331943 is about 552.1480110952.

The spelling of 168331943 in words is "one hundred sixty-eight million, three hundred thirty-one thousand, nine hundred forty-three".