195922976243 has 2 divisors, whose sum is σ = 195922976244. Its totient is φ = 195922976242.

The previous prime is 195922976239. The next prime is 195922976299. The reversal of 195922976243 is 342679229591.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (342679229591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195922976243 - 2² = 195922976239 is a prime.

It is not a weakly prime, because it can be changed into another prime (195922976203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97961488121 + 97961488122.

It is an arithmetic number, because the mean of its divisors is an integer number (97961488122).

Almost surely, 2^195922976243 is an apocalyptic number.

195922976243 is a deficient number, since it is larger than the sum of its proper divisors (1).

195922976243 is an equidigital number, since it uses as much as digits as its factorization.

195922976243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 59.

The spelling of 195922976243 in words is "one hundred ninety-five billion, nine hundred twenty-two million, nine hundred seventy-six thousand, two hundred forty-three".