199447623 has 16 divisors (see below), whose sum is σ = 296216800. Its totient is φ = 132632640.

The previous prime is 199447609. The next prime is 199447627. The reversal of 199447623 is 326744991.

It is a happy number.

199447623 is a `hidden beast` number, since 19 + 9 + 4 + 4 + 7 + 623 = 666.

It is not a de Polignac number, because 199447623 - 2¹⁸ = 199185479 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 (199447627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2013 + ... + 20073.

It is an arithmetic number, because the mean of its divisors is an integer number (18513550).

Almost surely, 2^199447623 is an apocalyptic number.

199447623 is a deficient number, since it is larger than the sum of its proper divisors (96769177).

199447623 is a wasteful number, since it uses less digits than its factorization.

199447623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18479 (or 18473 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 199447623 is about 14122.5926444120. The cubic root of 199447623 is about 584.2646645112.

The spelling of 199447623 in words is "one hundred ninety-nine million, four hundred forty-seven thousand, six hundred twenty-three".