168211807 has 16 divisors (see below), whose sum is σ = 182538720. Its totient is φ = 154483200.

The previous prime is 168211801. The next prime is 168211819. The reversal of 168211807 is 708112861.

It is a cyclic number.

It is not a de Polignac number, because 168211807 - 2¹¹ = 168209759 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 (168211801) 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, 140403 + ... + 141595.

It is an arithmetic number, because the mean of its divisors is an integer number (11408670).

Almost surely, 2^168211807 is an apocalyptic number.

168211807 is a deficient number, since it is larger than the sum of its proper divisors (14326913).

168211807 is a wasteful number, since it uses less digits than its factorization.

168211807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 5376, while the sum is 34.

The square root of 168211807 is about 12969.6494555558. The cubic root of 168211807 is about 552.0166265646.

The spelling of 168211807 in words is "one hundred sixty-eight million, two hundred eleven thousand, eight hundred seven".