168104909 has 16 divisors (see below), whose sum is σ = 205163520. Its totient is φ = 134628480.

The previous prime is 168104899. The next prime is 168104917. The reversal of 168104909 is 909401861.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-168104909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168104939) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7064 + ... + 19649.

It is an arithmetic number, because the mean of its divisors is an integer number (12822720).

Almost surely, 2^168104909 is an apocalyptic number.

It is an amenable number.

168104909 is a deficient number, since it is larger than the sum of its proper divisors (37058611).

168104909 is a wasteful number, since it uses less digits than its factorization.

168104909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26780.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 168104909 is about 12965.5277177599. The cubic root of 168104909 is about 551.8996669232.

The spelling of 168104909 in words is "one hundred sixty-eight million, one hundred four thousand, nine hundred nine".