197800089 has 16 divisors (see below), whose sum is σ = 278345280. Its totient is φ = 124597440.

The previous prime is 197800021. The next prime is 197800091. The reversal of 197800089 is 980008791.

It is not a de Polignac number, because 197800089 - 2²⁷ = 63582361 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197800089.

It is not an unprimeable number, because it can be changed into a prime (197800019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18259 + ... + 26999.

It is an arithmetic number, because the mean of its divisors is an integer number (17396580).

Almost surely, 2^197800089 is an apocalyptic number.

197800089 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

197800089 is a deficient number, since it is larger than the sum of its proper divisors (80545191).

197800089 is a wasteful number, since it uses less digits than its factorization.

197800089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9160.

The product of its (nonzero) digits is 36288, while the sum is 42.

The square root of 197800089 is about 14064.1419574747. The cubic root of 197800089 is about 582.6514445940.

The spelling of 197800089 in words is "one hundred ninety-seven million, eight hundred thousand, eighty-nine".