4197968209 has 2 divisors, whose sum is σ = 4197968210. Its totient is φ = 4197968208.

The previous prime is 4197968179. The next prime is 4197968213. The reversal of 4197968209 is 9028697914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2199610000 + 1998358209 = 46900^2 + 44703^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4197968209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4197968209.

It is not a weakly prime, because it can be changed into another prime (4197968239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2098984104 + 2098984105.

It is an arithmetic number, because the mean of its divisors is an integer number (2098984105).

Almost surely, 2^4197968209 is an apocalyptic number.

It is an amenable number.

4197968209 is a deficient number, since it is larger than the sum of its proper divisors (1).

4197968209 is an equidigital number, since it uses as much as digits as its factorization.

4197968209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The square root of 4197968209 is about 64791.7294799267. The cubic root of 4197968209 is about 1613.1684334407.

The spelling of 4197968209 in words is "four billion, one hundred ninety-seven million, nine hundred sixty-eight thousand, two hundred nine".