199836436 has 6 divisors (see below), whose sum is σ = 349713770. Its totient is φ = 99918216.

The previous prime is 199836409. The next prime is 199836451. The reversal of 199836436 is 634638991.

It can be written as a sum of positive squares in only one way, i.e., 169520400 + 30316036 = 13020^2 + 5506^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 199836436.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24979551 + ... + 24979558.

Almost surely, 2^199836436 is an apocalyptic number.

It is an amenable number.

199836436 is a deficient number, since it is larger than the sum of its proper divisors (149877334).

199836436 is a wasteful number, since it uses less digits than its factorization.

199836436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49959113 (or 49959111 counting only the distinct ones).

The product of its digits is 839808, while the sum is 49.

The square root of 199836436 is about 14136.3515802346. The cubic root of 199836436 is about 584.6440828177.

The spelling of 199836436 in words is "one hundred ninety-nine million, eight hundred thirty-six thousand, four hundred thirty-six".