199763961 has 16 divisors (see below), whose sum is σ = 270422400. Its totient is φ = 131155200.

The previous prime is 199763953. The next prime is 199763981. The reversal of 199763961 is 169367991.

It is not a de Polignac number, because 199763961 - 2³ = 199763953 is a prime.

It is a super-2 number, since 2×199763961² = 79811280228819042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (199763981) 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 15 ways as a sum of consecutive naturals, for example, 58641 + ... + 61953.

It is an arithmetic number, because the mean of its divisors is an integer number (16901400).

Almost surely, 2^199763961 is an apocalyptic number.

It is an amenable number.

199763961 is a deficient number, since it is larger than the sum of its proper divisors (70658439).

199763961 is a wasteful number, since it uses less digits than its factorization.

199763961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3616.

The product of its digits is 551124, while the sum is 51.

The square root of 199763961 is about 14133.7879211484. The cubic root of 199763961 is about 584.5733963367.

The spelling of 199763961 in words is "one hundred ninety-nine million, seven hundred sixty-three thousand, nine hundred sixty-one".