199976889 has 20 divisors (see below), whose sum is σ = 311067856. Its totient is φ = 114268392.

The previous prime is 199976879. The next prime is 199976893. The reversal of 199976889 is 988679991.

It is not a de Polignac number, because 199976889 - 2⁴ = 199976873 is a prime.

It is a super-2 number, since 2×199976889² = 79981512268236642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199976879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6679 + ... + 21084.

Almost surely, 2^199976889 is an apocalyptic number.

It is an amenable number.

199976889 is a deficient number, since it is larger than the sum of its proper divisors (111090967).

199976889 is an frugal number, since it uses more digits than its factorization.

199976889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27794 (or 27773 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 66.

The square root of 199976889 is about 14141.3185028837. The cubic root of 199976889 is about 584.7810211169.

The spelling of 199976889 in words is "one hundred ninety-nine million, nine hundred seventy-six thousand, eight hundred eighty-nine".