197207311361 has 2 divisors, whose sum is σ = 197207311362. Its totient is φ = 197207311360.

The previous prime is 197207311339. The next prime is 197207311391. The reversal of 197207311361 is 163113702791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126847096336 + 70360215025 = 356156^2 + 265255^2 .

It is a cyclic number.

It is not a de Polignac number, because 197207311361 - 2¹⁸ = 197207049217 is a prime.

It is not a weakly prime, because it can be changed into another prime (197207311331) 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, 98603655680 + 98603655681.

It is an arithmetic number, because the mean of its divisors is an integer number (98603655681).

Almost surely, 2^197207311361 is an apocalyptic number.

It is an amenable number.

197207311361 is a deficient number, since it is larger than the sum of its proper divisors (1).

197207311361 is an equidigital number, since it uses as much as digits as its factorization.

197207311361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47628, while the sum is 41.

The spelling of 197207311361 in words is "one hundred ninety-seven billion, two hundred seven million, three hundred eleven thousand, three hundred sixty-one".