199899406 has 8 divisors (see below), whose sum is σ = 342684720. Its totient is φ = 85671168.

The previous prime is 199899383. The next prime is 199899421. The reversal of 199899406 is 604998991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7139251 + ... + 7139278.

It is an arithmetic number, because the mean of its divisors is an integer number (42835590).

Almost surely, 2^199899406 is an apocalyptic number.

199899406 is a deficient number, since it is larger than the sum of its proper divisors (142785314).

199899406 is a wasteful number, since it uses less digits than its factorization.

199899406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14278538.

The product of its (nonzero) digits is 1259712, while the sum is 55.

The square root of 199899406 is about 14138.5786414335. The cubic root of 199899406 is about 584.7054849864.

The spelling of 199899406 in words is "one hundred ninety-nine million, eight hundred ninety-nine thousand, four hundred six".