163968197 has 4 divisors (see below), whose sum is σ = 163997100. Its totient is φ = 163939296.

The previous prime is 163968193. The next prime is 163968199. The reversal of 163968197 is 791869361.

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 102596641 + 61371556 = 10129^2 + 7834^2 .

It is a cyclic number.

It is not a de Polignac number, because 163968197 - 2² = 163968193 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 (163968193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2822 + ... + 18327.

It is an arithmetic number, because the mean of its divisors is an integer number (40999275).

Almost surely, 2^163968197 is an apocalyptic number.

It is an amenable number.

163968197 is a deficient number, since it is larger than the sum of its proper divisors (28903).

163968197 is an equidigital number, since it uses as much as digits as its factorization.

163968197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28902.

The product of its digits is 489888, while the sum is 50.

The square root of 163968197 is about 12805.0067161248. The cubic root of 163968197 is about 547.3349830384.

The spelling of 163968197 in words is "one hundred sixty-three million, nine hundred sixty-eight thousand, one hundred ninety-seven".