199994635 has 8 divisors (see below), whose sum is σ = 245100096. Its totient is φ = 156591360.

The previous prime is 199994633. The next prime is 199994689. The reversal of 199994635 is 536499991.

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

It is not a de Polignac number, because 199994635 - 2¹ = 199994633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199994633) 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 7 ways as a sum of consecutive naturals, for example, 425286 + ... + 425755.

It is an arithmetic number, because the mean of its divisors is an integer number (30637512).

Almost surely, 2^199994635 is an apocalyptic number.

199994635 is a deficient number, since it is larger than the sum of its proper divisors (45105461).

199994635 is an equidigital number, since it uses as much as digits as its factorization.

199994635 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851093.

The product of its digits is 2361960, while the sum is 55.

The square root of 199994635 is about 14141.9459410648. The cubic root of 199994635 is about 584.7983184774.

The spelling of 199994635 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, six hundred thirty-five".