197039691571 has 2 divisors, whose sum is σ = 197039691572. Its totient is φ = 197039691570.

The previous prime is 197039691529. The next prime is 197039691601. The reversal of 197039691571 is 175196930791.

It is a strong prime.

It is an emirp because it is prime and its reverse (175196930791) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197039691571 is a prime.

It is not a weakly prime, because it can be changed into another prime (197039691271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98519845785 + 98519845786.

It is an arithmetic number, because the mean of its divisors is an integer number (98519845786).

Almost surely, 2^197039691571 is an apocalyptic number.

197039691571 is a deficient number, since it is larger than the sum of its proper divisors (1).

197039691571 is an equidigital number, since it uses as much as digits as its factorization.

197039691571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3214890, while the sum is 58.

The spelling of 197039691571 in words is "one hundred ninety-seven billion, thirty-nine million, six hundred ninety-one thousand, five hundred seventy-one".