196143609197 has 2 divisors, whose sum is σ = 196143609198. Its totient is φ = 196143609196.

The previous prime is 196143609157. The next prime is 196143609217. The reversal of 196143609197 is 791906341691.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160553277481 + 35590331716 = 400691^2 + 188654^2 .

It is a cyclic number.

It is not a de Polignac number, because 196143609197 - 2²⁴ = 196126831981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196143609157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98071804598 + 98071804599.

It is an arithmetic number, because the mean of its divisors is an integer number (98071804599).

Almost surely, 2^196143609197 is an apocalyptic number.

It is an amenable number.

196143609197 is a deficient number, since it is larger than the sum of its proper divisors (1).

196143609197 is an equidigital number, since it uses as much as digits as its factorization.

196143609197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2204496, while the sum is 56.

The spelling of 196143609197 in words is "one hundred ninety-six billion, one hundred forty-three million, six hundred nine thousand, one hundred ninety-seven".