199880069 has 2 divisors, whose sum is σ = 199880070. Its totient is φ = 199880068.

The previous prime is 199880003. The next prime is 199880113. The reversal of 199880069 is 960088991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111049444 + 88830625 = 10538^2 + 9425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199880069 is a prime.

It is a super-2 number, since 2×199880069² = 79904083966889522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199879999 and 199880026.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199880269) 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, 99940034 + 99940035.

It is an arithmetic number, because the mean of its divisors is an integer number (99940035).

Almost surely, 2^199880069 is an apocalyptic number.

It is an amenable number.

199880069 is a deficient number, since it is larger than the sum of its proper divisors (1).

199880069 is an equidigital number, since it uses as much as digits as its factorization.

199880069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 279936, while the sum is 50.

The square root of 199880069 is about 14137.8947867071. The cubic root of 199880069 is about 584.6866308124.

The spelling of 199880069 in words is "one hundred ninety-nine million, eight hundred eighty thousand, sixty-nine".