168388243 has 4 divisors (see below), whose sum is σ = 171148768. Its totient is φ = 165627720.

The previous prime is 168388237. The next prime is 168388273. The reversal of 168388243 is 342883861.

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 168388243 - 2¹⁷ = 168257171 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 168388243.

It is not an unprimeable number, because it can be changed into a prime (168388223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380171 + ... + 1380292.

It is an arithmetic number, because the mean of its divisors is an integer number (42787192).

Almost surely, 2^168388243 is an apocalyptic number.

168388243 is a deficient number, since it is larger than the sum of its proper divisors (2760525).

168388243 is an equidigital number, since it uses as much as digits as its factorization.

168388243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2760524.

The product of its digits is 221184, while the sum is 43.

The square root of 168388243 is about 12976.4495529401. The cubic root of 168388243 is about 552.2095610452.

The spelling of 168388243 in words is "one hundred sixty-eight million, three hundred eighty-eight thousand, two hundred forty-three".