196969819 has 2 divisors, whose sum is σ = 196969820. Its totient is φ = 196969818.

The previous prime is 196969763. The next prime is 196969823. The reversal of 196969819 is 918969691.

It is a strong prime.

It is an emirp because it is prime and its reverse (918969691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196969819 - 2⁹ = 196969307 is a prime.

It is a super-2 number, since 2×196969819² = 77594219193785522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (196969519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98484909 + 98484910.

It is an arithmetic number, because the mean of its divisors is an integer number (98484910).

Almost surely, 2^196969819 is an apocalyptic number.

196969819 is a deficient number, since it is larger than the sum of its proper divisors (1).

196969819 is an equidigital number, since it uses as much as digits as its factorization.

196969819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1889568, while the sum is 58.

The square root of 196969819 is about 14034.5936528280. The cubic root of 196969819 is about 581.8350707463.

The spelling of 196969819 in words is "one hundred ninety-six million, nine hundred sixty-nine thousand, eight hundred nineteen".