168198813 has 12 divisors (see below), whose sum is σ = 243067968. Its totient is φ = 112079880.

The previous prime is 168198809. The next prime is 168198817. The reversal of 168198813 is 318891861.

It is an interprime number because it is at equal distance from previous prime (168198809) and next prime (168198817).

It is not a de Polignac number, because 168198813 - 2² = 168198809 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 (168198817) 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 11 ways as a sum of consecutive naturals, for example, 30106 + ... + 35252.

It is an arithmetic number, because the mean of its divisors is an integer number (20255664).

Almost surely, 2^168198813 is an apocalyptic number.

It is an amenable number.

168198813 is a deficient number, since it is larger than the sum of its proper divisors (74869155).

168198813 is a wasteful number, since it uses less digits than its factorization.

168198813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8784 (or 8781 counting only the distinct ones).

The product of its digits is 82944, while the sum is 45.

The square root of 168198813 is about 12969.1485071303. The cubic root of 168198813 is about 552.0024121665.

The spelling of 168198813 in words is "one hundred sixty-eight million, one hundred ninety-eight thousand, eight hundred thirteen".