168484409 has 4 divisors (see below), whose sum is σ = 168525300. Its totient is φ = 168443520.

The previous prime is 168484391. The next prime is 168484417. The reversal of 168484409 is 904484861.

168484409 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.

It can be written as a sum of positive squares in 2 ways, for example, as 78765625 + 89718784 = 8875^2 + 9472^2 .

It is a cyclic number.

It is not a de Polignac number, because 168484409 - 2²⁰ = 167435833 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 168484409.

It is not an unprimeable number, because it can be changed into a prime (168484109) 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, 13472 + ... + 22769.

It is an arithmetic number, because the mean of its divisors is an integer number (42131325).

Almost surely, 2^168484409 is an apocalyptic number.

It is an amenable number.

168484409 is a deficient number, since it is larger than the sum of its proper divisors (40891).

168484409 is an equidigital number, since it uses as much as digits as its factorization.

168484409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40890.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 168484409 is about 12980.1544289735. The cubic root of 168484409 is about 552.3146627589.

The spelling of 168484409 in words is "one hundred sixty-eight million, four hundred eighty-four thousand, four hundred nine".