197142089 has 2 divisors, whose sum is σ = 197142090. Its totient is φ = 197142088.

The previous prime is 197142053. The next prime is 197142107. The reversal of 197142089 is 980241791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166616464 + 30525625 = 12908^2 + 5525^2 .

It is an emirp because it is prime and its reverse (980241791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197142089 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197142019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98571044 + 98571045.

It is an arithmetic number, because the mean of its divisors is an integer number (98571045).

Almost surely, 2^197142089 is an apocalyptic number.

It is an amenable number.

197142089 is a deficient number, since it is larger than the sum of its proper divisors (1).

197142089 is an equidigital number, since it uses as much as digits as its factorization.

197142089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 41.

The square root of 197142089 is about 14040.7296462826. The cubic root of 197142089 is about 582.0046458300.

The spelling of 197142089 in words is "one hundred ninety-seven million, one hundred forty-two thousand, eighty-nine".