168938459 has 4 divisors (see below), whose sum is σ = 169340160. Its totient is φ = 168536760.

The previous prime is 168938453. The next prime is 168938461. The reversal of 168938459 is 954839861.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-168938459 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 168938459.

It is not an unprimeable number, because it can be changed into a prime (168938453) 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, 200219 + ... + 201060.

It is an arithmetic number, because the mean of its divisors is an integer number (42335040).

Almost surely, 2^168938459 is an apocalyptic number.

168938459 is a deficient number, since it is larger than the sum of its proper divisors (401701).

168938459 is an equidigital number, since it uses as much as digits as its factorization.

168938459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401700.

The product of its digits is 1866240, while the sum is 53.

The square root of 168938459 is about 12997.6328229413. The cubic root of 168938459 is about 552.8103634903.

It can be divided in two parts, 16893 and 8459, that added together give a palindrome (25352).

The spelling of 168938459 in words is "one hundred sixty-eight million, nine hundred thirty-eight thousand, four hundred fifty-nine".