197894317241 has 2 divisors, whose sum is σ = 197894317242. Its totient is φ = 197894317240.

The previous prime is 197894317219. The next prime is 197894317337. The reversal of 197894317241 is 142713498791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151454067241 + 46440250000 = 389171^2 + 215500^2 .

It is an emirp because it is prime and its reverse (142713498791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197894317241 - 2⁶ = 197894317177 is a prime.

It is not a weakly prime, because it can be changed into another prime (197894317741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98947158620 + 98947158621.

It is an arithmetic number, because the mean of its divisors is an integer number (98947158621).

Almost surely, 2^197894317241 is an apocalyptic number.

It is an amenable number.

197894317241 is a deficient number, since it is larger than the sum of its proper divisors (1).

197894317241 is an equidigital number, since it uses as much as digits as its factorization.

197894317241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3048192, while the sum is 56.

The spelling of 197894317241 in words is "one hundred ninety-seven billion, eight hundred ninety-four million, three hundred seventeen thousand, two hundred forty-one".