196197961 has 2 divisors, whose sum is σ = 196197962. Its totient is φ = 196197960.

The previous prime is 196197959. The next prime is 196198019. The reversal of 196197961 is 169791691.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194769936 + 1428025 = 13956^2 + 1195^2 .

It is an emirp because it is prime and its reverse (169791691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 196197961 - 2¹ = 196197959 is a prime.

Together with 196197959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (196197761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98098980 + 98098981.

It is an arithmetic number, because the mean of its divisors is an integer number (98098981).

Almost surely, 2^196197961 is an apocalyptic number.

It is an amenable number.

196197961 is a deficient number, since it is larger than the sum of its proper divisors (1).

196197961 is an equidigital number, since it uses as much as digits as its factorization.

196197961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 183708, while the sum is 49.

The square root of 196197961 is about 14007.0682514222. The cubic root of 196197961 is about 581.0740709942.

The spelling of 196197961 in words is "one hundred ninety-six million, one hundred ninety-seven thousand, nine hundred sixty-one".