197682889 has 2 divisors, whose sum is σ = 197682890. Its totient is φ = 197682888.

The previous prime is 197682887. The next prime is 197682931. The reversal of 197682889 is 988286791.

197682889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 193682889 + 4000000 = 13917^2 + 2000^2 .

It is a cyclic number.

It is not a de Polignac number, because 197682889 - 2¹ = 197682887 is a prime.

Together with 197682887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (197682887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98841444 + 98841445.

It is an arithmetic number, because the mean of its divisors is an integer number (98841445).

Almost surely, 2^197682889 is an apocalyptic number.

It is an amenable number.

197682889 is a deficient number, since it is larger than the sum of its proper divisors (1).

197682889 is an equidigital number, since it uses as much as digits as its factorization.

197682889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3483648, while the sum is 58.

The square root of 197682889 is about 14059.9747154822. The cubic root of 197682889 is about 582.5363448130.

The spelling of 197682889 in words is "one hundred ninety-seven million, six hundred eighty-two thousand, eight hundred eighty-nine".