199906954589 has 2 divisors, whose sum is σ = 199906954590. Its totient is φ = 199906954588.

The previous prime is 199906954561. The next prime is 199906954603. The reversal of 199906954589 is 985459609991.

199906954589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 186414970564 + 13491984025 = 431758^2 + 116155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199906954589 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199906954189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99953477294 + 99953477295.

It is an arithmetic number, because the mean of its divisors is an integer number (99953477295).

Almost surely, 2^199906954589 is an apocalyptic number.

It is an amenable number.

199906954589 is a deficient number, since it is larger than the sum of its proper divisors (1).

199906954589 is an equidigital number, since it uses as much as digits as its factorization.

199906954589 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 283435200, while the sum is 74.

The spelling of 199906954589 in words is "one hundred ninety-nine billion, nine hundred six million, nine hundred fifty-four thousand, five hundred eighty-nine".