168398 has 4 divisors (see below), whose sum is σ = 252600. Its totient is φ = 84198.

The previous prime is 168391. The next prime is 168409. The reversal of 168398 is 893861.

168398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 893861 = 281 ⋅3181.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42098 + ... + 42101.

It is an arithmetic number, because the mean of its divisors is an integer number (63150).

2¹⁶⁸³⁹⁸ is an apocalyptic number.

168398 is a deficient number, since it is larger than the sum of its proper divisors (84202).

168398 is an equidigital number, since it uses as much as digits as its factorization.

168398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84201.

The product of its digits is 10368, while the sum is 35.

The square root of 168398 is about 410.3632537155. The cubic root of 168398 is about 55.2220226486. Note that the first 3 decimals are identical.

The spelling of 168398 in words is "one hundred sixty-eight thousand, three hundred ninety-eight".