196942851779 has 2 divisors, whose sum is σ = 196942851780. Its totient is φ = 196942851778.

The previous prime is 196942851713. The next prime is 196942851841. The reversal of 196942851779 is 977158249691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196942851779 - 2¹² = 196942847683 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (196942841779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98471425889 + 98471425890.

It is an arithmetic number, because the mean of its divisors is an integer number (98471425890).

Almost surely, 2^196942851779 is an apocalyptic number.

196942851779 is a deficient number, since it is larger than the sum of its proper divisors (1).

196942851779 is an equidigital number, since it uses as much as digits as its factorization.

196942851779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 68.

The spelling of 196942851779 in words is "one hundred ninety-six billion, nine hundred forty-two million, eight hundred fifty-one thousand, seven hundred seventy-nine".