197197859 has 2 divisors, whose sum is σ = 197197860. Its totient is φ = 197197858.

The previous prime is 197197843. The next prime is 197197867. The reversal of 197197859 is 958791791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197197859 - 2⁴ = 197197843 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (197197879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98598929 + 98598930.

It is an arithmetic number, because the mean of its divisors is an integer number (98598930).

Almost surely, 2^197197859 is an apocalyptic number.

197197859 is a deficient number, since it is larger than the sum of its proper divisors (1).

197197859 is an equidigital number, since it uses as much as digits as its factorization.

197197859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 56.

The square root of 197197859 is about 14042.7155137459. The cubic root of 197197859 is about 582.0595222205.

The spelling of 197197859 in words is "one hundred ninety-seven million, one hundred ninety-seven thousand, eight hundred fifty-nine".