199349905 has 16 divisors (see below), whose sum is σ = 255239424. Its totient is φ = 148944640.

The previous prime is 199349851. The next prime is 199349911. The reversal of 199349905 is 509943991.

It is not a de Polignac number, because 199349905 - 2¹¹ = 199347857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2184 + ... + 20086.

It is an arithmetic number, because the mean of its divisors is an integer number (15952464).

Almost surely, 2^199349905 is an apocalyptic number.

It is an amenable number.

199349905 is a deficient number, since it is larger than the sum of its proper divisors (55889519).

199349905 is a wasteful number, since it uses less digits than its factorization.

199349905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18056.

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 199349905 is about 14119.1325866712. The cubic root of 199349905 is about 584.1692300970.

The spelling of 199349905 in words is "one hundred ninety-nine million, three hundred forty-nine thousand, nine hundred five".