199169689 has 2 divisors, whose sum is σ = 199169690. Its totient is φ = 199169688.

The previous prime is 199169683. The next prime is 199169701. The reversal of 199169689 is 986961991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198584464 + 585225 = 14092^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 199169689 - 2²⁷ = 64951961 is a prime.

It is not a weakly prime, because it can be changed into another prime (199169683) 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, 99584844 + 99584845.

It is an arithmetic number, because the mean of its divisors is an integer number (99584845).

Almost surely, 2^199169689 is an apocalyptic number.

It is an amenable number.

199169689 is a deficient number, since it is larger than the sum of its proper divisors (1).

199169689 is an equidigital number, since it uses as much as digits as its factorization.

199169689 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 199169689 is about 14112.7491652052. The cubic root of 199169689 is about 583.9931437629.

The spelling of 199169689 in words is "one hundred ninety-nine million, one hundred sixty-nine thousand, six hundred eighty-nine".