168336909 has 24 divisors (see below), whose sum is σ = 270892440. Its totient is φ = 100017792.

The previous prime is 168336901. The next prime is 168336929. The reversal of 168336909 is 909633861.

It can be written as a sum of positive squares in 4 ways, for example, as 5391684 + 162945225 = 2322^2 + 12765^2 .

It is not a de Polignac number, because 168336909 - 2³ = 168336901 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168336901) 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 23 ways as a sum of consecutive naturals, for example, 21414 + ... + 28199.

It is an arithmetic number, because the mean of its divisors is an integer number (11287185).

Almost surely, 2^168336909 is an apocalyptic number.

It is an amenable number.

168336909 is a deficient number, since it is larger than the sum of its proper divisors (102555531).

168336909 is a wasteful number, since it uses less digits than its factorization.

168336909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49661 (or 49658 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 168336909 is about 12974.4714343206. The cubic root of 168336909 is about 552.1534407244.

The spelling of 168336909 in words is "one hundred sixty-eight million, three hundred thirty-six thousand, nine hundred nine".