197043406849 has 2 divisors, whose sum is σ = 197043406850. Its totient is φ = 197043406848.

The previous prime is 197043406843. The next prime is 197043406883. The reversal of 197043406849 is 948604340791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 196597352449 + 446054400 = 443393^2 + 21120^2 .

It is a cyclic number.

It is not a de Polignac number, because 197043406849 - 2¹⁷ = 197043275777 is a prime.

It is a super-2 number, since 2×197043406849² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 197043406849.

It is not a weakly prime, because it can be changed into another prime (197043406843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98521703424 + 98521703425.

It is an arithmetic number, because the mean of its divisors is an integer number (98521703425).

Almost surely, 2^197043406849 is an apocalyptic number.

It is an amenable number.

197043406849 is a deficient number, since it is larger than the sum of its proper divisors (1).

197043406849 is an equidigital number, since it uses as much as digits as its factorization.

197043406849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5225472, while the sum is 55.

The spelling of 197043406849 in words is "one hundred ninety-seven billion, forty-three million, four hundred six thousand, eight hundred forty-nine".