197869289 has 2 divisors, whose sum is σ = 197869290. Its totient is φ = 197869288.

The previous prime is 197869277. The next prime is 197869297. The reversal of 197869289 is 982968791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194323600 + 3545689 = 13940^2 + 1883^2 .

It is a cyclic number.

It is not a de Polignac number, because 197869289 - 2²⁴ = 181092073 is a prime.

It is not a weakly prime, because it can be changed into another prime (197869219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98934644 + 98934645.

It is an arithmetic number, because the mean of its divisors is an integer number (98934645).

Almost surely, 2^197869289 is an apocalyptic number.

It is an amenable number.

197869289 is a deficient number, since it is larger than the sum of its proper divisors (1).

197869289 is an equidigital number, since it uses as much as digits as its factorization.

197869289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 59.

The square root of 197869289 is about 14066.6018995349. The cubic root of 197869289 is about 582.7193831866.

The spelling of 197869289 in words is "one hundred ninety-seven million, eight hundred sixty-nine thousand, two hundred eighty-nine".