199589906 has 16 divisors (see below), whose sum is σ = 313818624. Its totient is φ = 95023104.

The previous prime is 199589903. The next prime is 199589909. The reversal of 199589906 is 609985991.

It is an interprime number because it is at equal distance from previous prime (199589903) and next prime (199589909).

It is a super-2 number, since 2×199589906² = 79672261154177672, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199589903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530 + ... + 19986.

It is an arithmetic number, because the mean of its divisors is an integer number (19613664).

Almost surely, 2^199589906 is an apocalyptic number.

199589906 is a deficient number, since it is larger than the sum of its proper divisors (114228718).

199589906 is a wasteful number, since it uses less digits than its factorization.

199589906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19705.

The product of its (nonzero) digits is 1574640, while the sum is 56.

The square root of 199589906 is about 14127.6291712375. The cubic root of 199589906 is about 584.4035667582.

The spelling of 199589906 in words is "one hundred ninety-nine million, five hundred eighty-nine thousand, nine hundred six".