4197968609 has 2 divisors, whose sum is σ = 4197968610. Its totient is φ = 4197968608.

The previous prime is 4197968581. The next prime is 4197968647. The reversal of 4197968609 is 9068697914.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4192951009 + 5017600 = 64753^2 + 2240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4197968609 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4197968209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2098984304 + 2098984305.

It is an arithmetic number, because the mean of its divisors is an integer number (2098984305).

Almost surely, 2^4197968609 is an apocalyptic number.

It is an amenable number.

4197968609 is a deficient number, since it is larger than the sum of its proper divisors (1).

4197968609 is an equidigital number, since it uses as much as digits as its factorization.

4197968609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 4197968609 is about 64791.7325667403. The cubic root of 4197968609 is about 1613.1684846772.

The spelling of 4197968609 in words is "four billion, one hundred ninety-seven million, nine hundred sixty-eight thousand, six hundred nine".