197860864361 has 2 divisors, whose sum is σ = 197860864362. Its totient is φ = 197860864360.

The previous prime is 197860864351. The next prime is 197860864363. The reversal of 197860864361 is 163468068791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151321000000 + 46539864361 = 389000^2 + 215731^2 .

It is a cyclic number.

It is not a de Polignac number, because 197860864361 - 2⁶ = 197860864297 is a prime.

Together with 197860864363, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197860864361.

It is not a weakly prime, because it can be changed into another prime (197860864363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98930432180 + 98930432181.

It is an arithmetic number, because the mean of its divisors is an integer number (98930432181).

Almost surely, 2^197860864361 is an apocalyptic number.

It is an amenable number.

197860864361 is a deficient number, since it is larger than the sum of its proper divisors (1).

197860864361 is an equidigital number, since it uses as much as digits as its factorization.

197860864361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 59.

The spelling of 197860864361 in words is "one hundred ninety-seven billion, eight hundred sixty million, eight hundred sixty-four thousand, three hundred sixty-one".