199357906 has 24 divisors (see below), whose sum is σ = 331808400. Its totient is φ = 89758680.

The previous prime is 199357903. The next prime is 199357909. The reversal of 199357906 is 609753991.

It is an interprime number because it is at equal distance from previous prime (199357903) and next prime (199357909).

It is a self number, because there is not a number n which added to its sum of digits gives 199357906.

It is not an unprimeable number, because it can be changed into a prime (199357903) 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 in 11 ways as a sum of consecutive naturals, for example, 22045 + ... + 29743.

It is an arithmetic number, because the mean of its divisors is an integer number (13825350).

Almost surely, 2^199357906 is an apocalyptic number.

199357906 is a deficient number, since it is larger than the sum of its proper divisors (132450494).

199357906 is a wasteful number, since it uses less digits than its factorization.

199357906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7830 (or 7819 counting only the distinct ones).

The product of its (nonzero) digits is 459270, while the sum is 49.

The square root of 199357906 is about 14119.4159227639. The cubic root of 199357906 is about 584.1770452926.

The spelling of 199357906 in words is "one hundred ninety-nine million, three hundred fifty-seven thousand, nine hundred six".