1968633533 has 2 divisors, whose sum is σ = 1968633534. Its totient is φ = 1968633532.

The previous prime is 1968633497. The next prime is 1968633551. The reversal of 1968633533 is 3353368691.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1131515044 + 837118489 = 33638^2 + 28933^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968633533 - 2³⁰ = 894891709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968623533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984316766 + 984316767.

It is an arithmetic number, because the mean of its divisors is an integer number (984316767).

Almost surely, 2^1968633533 is an apocalyptic number.

It is an amenable number.

1968633533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968633533 is an equidigital number, since it uses as much as digits as its factorization.

1968633533 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1049760, while the sum is 47.

The square root of 1968633533 is about 44369.2859194285. The cubic root of 1968633533 is about 1253.2997685968.

The spelling of 1968633533 in words is "one billion, nine hundred sixty-eight million, six hundred thirty-three thousand, five hundred thirty-three".