199191489 has 16 divisors (see below), whose sum is σ = 310934400. Its totient is φ = 111047040.

The previous prime is 199191481. The next prime is 199191491. The reversal of 199191489 is 984191991.

It is not a de Polignac number, because 199191489 - 2³ = 199191481 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (199191481) 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, 114814 + ... + 116535.

It is an arithmetic number, because the mean of its divisors is an integer number (19433400).

Almost surely, 2^199191489 is an apocalyptic number.

It is an amenable number.

199191489 is a deficient number, since it is larger than the sum of its proper divisors (111742911).

199191489 is a wasteful number, since it uses less digits than its factorization.

199191489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231400.

The product of its digits is 209952, while the sum is 51.

The square root of 199191489 is about 14113.5214953604. The cubic root of 199191489 is about 584.0144498598.

The spelling of 199191489 in words is "one hundred ninety-nine million, one hundred ninety-one thousand, four hundred eighty-nine".