168349985 has 4 divisors (see below), whose sum is σ = 202019988. Its totient is φ = 134679984.

The previous prime is 168349969. The next prime is 168349991. The reversal of 168349985 is 589943861.

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 100962304 + 67387681 = 10048^2 + 8209^2 .

It is a cyclic number.

It is not a de Polignac number, because 168349985 - 2⁴ = 168349969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16834994 + ... + 16835003.

It is an arithmetic number, because the mean of its divisors is an integer number (50504997).

Almost surely, 2^168349985 is an apocalyptic number.

It is an amenable number.

168349985 is a deficient number, since it is larger than the sum of its proper divisors (33670003).

168349985 is an equidigital number, since it uses as much as digits as its factorization.

168349985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33670002.

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

The square root of 168349985 is about 12974.9753371635. The cubic root of 168349985 is about 552.1677369978.

The spelling of 168349985 in words is "one hundred sixty-eight million, three hundred forty-nine thousand, nine hundred eighty-five".