4197965909 has 2 divisors, whose sum is σ = 4197965910. Its totient is φ = 4197965908.

The previous prime is 4197965867. The next prime is 4197965917. The reversal of 4197965909 is 9095697914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3374448100 + 823517809 = 58090^2 + 28697^2 .

It is a cyclic number.

It is not a de Polignac number, because 4197965909 - 2¹⁶ = 4197900373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4197965969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2098982954 + 2098982955.

It is an arithmetic number, because the mean of its divisors is an integer number (2098982955).

Almost surely, 2^4197965909 is an apocalyptic number.

It is an amenable number.

4197965909 is a deficient number, since it is larger than the sum of its proper divisors (1).

4197965909 is an equidigital number, since it uses as much as digits as its factorization.

4197965909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5511240, while the sum is 59.

The square root of 4197965909 is about 64791.7117307453. The cubic root of 4197965909 is about 1613.1681388309.

The spelling of 4197965909 in words is "four billion, one hundred ninety-seven million, nine hundred sixty-five thousand, nine hundred nine".