197684889 has 16 divisors (see below), whose sum is σ = 270908352. Its totient is φ = 128153088.

The previous prime is 197684887. The next prime is 197684897. The reversal of 197684889 is 988486791.

It is not a de Polignac number, because 197684889 - 2¹ = 197684887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (197684887) 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, 26769 + ... + 33345.

It is an arithmetic number, because the mean of its divisors is an integer number (16931772).

Almost surely, 2^197684889 is an apocalyptic number.

It is an amenable number.

197684889 is a deficient number, since it is larger than the sum of its proper divisors (73223463).

197684889 is a wasteful number, since it uses less digits than its factorization.

197684889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6856.

The product of its digits is 6967296, while the sum is 60.

The square root of 197684889 is about 14060.0458391856. The cubic root of 197684889 is about 582.5383093546.

The spelling of 197684889 in words is "one hundred ninety-seven million, six hundred eighty-four thousand, eight hundred eighty-nine".