199854407 has 4 divisors (see below), whose sum is σ = 210373080. Its totient is φ = 189335736.

The previous prime is 199854373. The next prime is 199854409. The reversal of 199854407 is 704458991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 199854407 - 2¹⁰ = 199853383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199854409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5259308 + ... + 5259345.

It is an arithmetic number, because the mean of its divisors is an integer number (52593270).

Almost surely, 2^199854407 is an apocalyptic number.

199854407 is a deficient number, since it is larger than the sum of its proper divisors (10518673).

199854407 is a wasteful number, since it uses less digits than its factorization.

199854407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10518672.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 199854407 is about 14136.9871967120. The cubic root of 199854407 is about 584.6616076897.

The spelling of 199854407 in words is "one hundred ninety-nine million, eight hundred fifty-four thousand, four hundred seven".