199982969 has 2 divisors, whose sum is σ = 199982970. Its totient is φ = 199982968.

The previous prime is 199982957. The next prime is 199982971. The reversal of 199982969 is 969289991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194965369 + 5017600 = 13963^2 + 2240^2 .

It is an emirp because it is prime and its reverse (969289991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199982969 - 2¹² = 199978873 is a prime.

It is a super-2 number, since 2×199982969² = 79986375780109922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 199982971, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (199912969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99991484 + 99991485.

It is an arithmetic number, because the mean of its divisors is an integer number (99991485).

Almost surely, 2^199982969 is an apocalyptic number.

It is an amenable number.

199982969 is a deficient number, since it is larger than the sum of its proper divisors (1).

199982969 is an equidigital number, since it uses as much as digits as its factorization.

199982969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5668704, while the sum is 62.

The square root of 199982969 is about 14141.5334741321. The cubic root of 199982969 is about 584.7869475227.

The spelling of 199982969 in words is "one hundred ninety-nine million, nine hundred eighty-two thousand, nine hundred sixty-nine".