1968694193 has 2 divisors, whose sum is σ = 1968694194. Its totient is φ = 1968694192.

The previous prime is 1968694099. The next prime is 1968694199. The reversal of 1968694193 is 3914968691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1929669184 + 39025009 = 43928^2 + 6247^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968694193 - 2¹⁸ = 1968432049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1968694199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984347096 + 984347097.

It is an arithmetic number, because the mean of its divisors is an integer number (984347097).

Almost surely, 2^1968694193 is an apocalyptic number.

It is an amenable number.

1968694193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968694193 is an equidigital number, since it uses as much as digits as its factorization.

1968694193 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2519424, while the sum is 56.

The square root of 1968694193 is about 44369.9694951439. The cubic root of 1968694193 is about 1253.3126412116.

The spelling of 1968694193 in words is "one billion, nine hundred sixty-eight million, six hundred ninety-four thousand, one hundred ninety-three".