197894843 has 2 divisors, whose sum is σ = 197894844. Its totient is φ = 197894842.

The previous prime is 197894831. The next prime is 197894857. The reversal of 197894843 is 348498791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197894843 - 2²⁰ = 196846267 is a prime.

It is not a weakly prime, because it can be changed into another prime (197894813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98947421 + 98947422.

It is an arithmetic number, because the mean of its divisors is an integer number (98947422).

Almost surely, 2^197894843 is an apocalyptic number.

197894843 is a deficient number, since it is larger than the sum of its proper divisors (1).

197894843 is an equidigital number, since it uses as much as digits as its factorization.

197894843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 53.

The square root of 197894843 is about 14067.5101919281. The cubic root of 197894843 is about 582.7444673726.

The spelling of 197894843 in words is "one hundred ninety-seven million, eight hundred ninety-four thousand, eight hundred forty-three".