195923972693 has 2 divisors, whose sum is σ = 195923972694. Its totient is φ = 195923972692.

The previous prime is 195923972677. The next prime is 195923972723. The reversal of 195923972693 is 396279329591.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195923972689 + 4 = 442633^2 + 2^2 .

It is a cyclic number.

It is not a de Polignac number, because 195923972693 - 2⁴ = 195923972677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195923972603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97961986346 + 97961986347.

It is an arithmetic number, because the mean of its divisors is an integer number (97961986347).

Almost surely, 2^195923972693 is an apocalyptic number.

It is an amenable number.

195923972693 is a deficient number, since it is larger than the sum of its proper divisors (1).

195923972693 is an equidigital number, since it uses as much as digits as its factorization.

195923972693 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49601160, while the sum is 65.

The spelling of 195923972693 in words is "one hundred ninety-five billion, nine hundred twenty-three million, nine hundred seventy-two thousand, six hundred ninety-three".