198259889 has 8 divisors (see below), whose sum is σ = 208824000. Its totient is φ = 187708752.

The previous prime is 198259861. The next prime is 198259913. The reversal of 198259889 is 988952891.

198259889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-198259889 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (198259819) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56807 + ... + 60195.

It is an arithmetic number, because the mean of its divisors is an integer number (26103000).

Almost surely, 2^198259889 is an apocalyptic number.

198259889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

198259889 is a deficient number, since it is larger than the sum of its proper divisors (10564111).

198259889 is a wasteful number, since it uses less digits than its factorization.

198259889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6487.

The product of its digits is 3732480, while the sum is 59.

The square root of 198259889 is about 14080.4790046362. The cubic root of 198259889 is about 583.1025664258.

The spelling of 198259889 in words is "one hundred ninety-eight million, two hundred fifty-nine thousand, eight hundred eighty-nine".