199768969 has 2 divisors, whose sum is σ = 199768970. Its totient is φ = 199768968.

The previous prime is 199768967. The next prime is 199768973. The reversal of 199768969 is 969867991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122943744 + 76825225 = 11088^2 + 8765^2 .

It is an emirp because it is prime and its reverse (969867991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199768969 - 2¹ = 199768967 is a prime.

It is a super-2 number, since 2×199768969² = 79815281950645922, which contains 22 as substring.

Together with 199768967, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 199768969.

It is not a weakly prime, because it can be changed into another prime (199768963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99884484 + 99884485.

It is an arithmetic number, because the mean of its divisors is an integer number (99884485).

Almost surely, 2^199768969 is an apocalyptic number.

It is an amenable number.

199768969 is a deficient number, since it is larger than the sum of its proper divisors (1).

199768969 is an equidigital number, since it uses as much as digits as its factorization.

199768969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13226976, while the sum is 64.

The square root of 199768969 is about 14133.9650841510. The cubic root of 199768969 is about 584.5782813004.

The spelling of 199768969 in words is "one hundred ninety-nine million, seven hundred sixty-eight thousand, nine hundred sixty-nine".