197962947691 has 2 divisors, whose sum is σ = 197962947692. Its totient is φ = 197962947690.

The previous prime is 197962947659. The next prime is 197962947697. The reversal of 197962947691 is 196749269791.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 197962947691 - 2⁵ = 197962947659 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197962947691.

It is not a weakly prime, because it can be changed into another prime (197962947697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98981473845 + 98981473846.

It is an arithmetic number, because the mean of its divisors is an integer number (98981473846).

Almost surely, 2^197962947691 is an apocalyptic number.

197962947691 is a deficient number, since it is larger than the sum of its proper divisors (1).

197962947691 is an equidigital number, since it uses as much as digits as its factorization.

197962947691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92588832, while the sum is 70.

The spelling of 197962947691 in words is "one hundred ninety-seven billion, nine hundred sixty-two million, nine hundred forty-seven thousand, six hundred ninety-one".