199010989 has 2 divisors, whose sum is σ = 199010990. Its totient is φ = 199010988.

The previous prime is 199010983. The next prime is 199011011. The reversal of 199010989 is 989010991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147816964 + 51194025 = 12158^2 + 7155^2 .

It is an emirp because it is prime and its reverse (989010991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199010989 - 2¹⁷ = 198879917 is a prime.

It is a Chen prime.

199010989 is a modest number, since divided by 10989 gives 199 as remainder.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199010983) 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, 99505494 + 99505495.

It is an arithmetic number, because the mean of its divisors is an integer number (99505495).

Almost surely, 2^199010989 is an apocalyptic number.

It is an amenable number.

199010989 is a deficient number, since it is larger than the sum of its proper divisors (1).

199010989 is an equidigital number, since it uses as much as digits as its factorization.

199010989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 46.

The square root of 199010989 is about 14107.1254690670. The cubic root of 199010989 is about 583.8379924122.

The spelling of 199010989 in words is "one hundred ninety-nine million, ten thousand, nine hundred eighty-nine".