199964836 has 6 divisors (see below), whose sum is σ = 349938470. Its totient is φ = 99982416.

The previous prime is 199964833. The next prime is 199964851. The reversal of 199964836 is 638469991.

It can be written as a sum of positive squares in only one way, i.e., 187854436 + 12110400 = 13706^2 + 3480^2 .

It is not an unprimeable number, because it can be changed into a prime (199964833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24995601 + ... + 24995608.

Almost surely, 2^199964836 is an apocalyptic number.

It is an amenable number.

199964836 is a deficient number, since it is larger than the sum of its proper divisors (149973634).

199964836 is a wasteful number, since it uses less digits than its factorization.

199964836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49991213 (or 49991211 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 55.

The square root of 199964836 is about 14140.8923339371. The cubic root of 199964836 is about 584.7692722471.

The spelling of 199964836 in words is "one hundred ninety-nine million, nine hundred sixty-four thousand, eight hundred thirty-six".