199110989 has 16 divisors (see below), whose sum is σ = 248603136. Its totient is φ = 154926000.

The previous prime is 199110973. The next prime is 199110991. The reversal of 199110989 is 989011991.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 199110989 - 2⁴ = 199110973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199110929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68414 + ... + 71264.

It is an arithmetic number, because the mean of its divisors is an integer number (15537696).

Almost surely, 2^199110989 is an apocalyptic number.

It is an amenable number.

199110989 is a deficient number, since it is larger than the sum of its proper divisors (49492147).

199110989 is a wasteful number, since it uses less digits than its factorization.

199110989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3776.

The product of its (nonzero) digits is 52488, while the sum is 47.

The square root of 199110989 is about 14110.6693321047. The cubic root of 199110989 is about 583.9357659461.

The spelling of 199110989 in words is "one hundred ninety-nine million, one hundred ten thousand, nine hundred eighty-nine".