199789807 has 24 divisors (see below), whose sum is σ = 249318000. Its totient is φ = 159134976.

The previous prime is 199789789. The next prime is 199789813. The reversal of 199789807 is 708987991.

It is not a de Polignac number, because 199789807 - 2¹⁹ = 199265519 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199789847) 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 23 ways as a sum of consecutive naturals, for example, 47319 + ... + 51367.

It is an arithmetic number, because the mean of its divisors is an integer number (10388250).

Almost surely, 2^199789807 is an apocalyptic number.

199789807 is a deficient number, since it is larger than the sum of its proper divisors (49528193).

199789807 is a wasteful number, since it uses less digits than its factorization.

199789807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135 (or 4128 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 58.

The square root of 199789807 is about 14134.7022253743. The cubic root of 199789807 is about 584.5986064770.

The spelling of 199789807 in words is "one hundred ninety-nine million, seven hundred eighty-nine thousand, eight hundred seven".