1968656071 has 2 divisors, whose sum is σ = 1968656072. Its totient is φ = 1968656070.

The previous prime is 1968656069. The next prime is 1968656099. The reversal of 1968656071 is 1706568691.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1706568691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1968656071 - 2¹ = 1968656069 is a prime.

Together with 1968656069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1968656021) 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, 984328035 + 984328036.

It is an arithmetic number, because the mean of its divisors is an integer number (984328036).

Almost surely, 2^1968656071 is an apocalyptic number.

1968656071 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968656071 is an equidigital number, since it uses as much as digits as its factorization.

1968656071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 544320, while the sum is 49.

The square root of 1968656071 is about 44369.5399007021. The cubic root of 1968656071 is about 1253.3045514004.

It can be divided in two parts, 19686 and 56071, that added together give a palindrome (75757).

The spelling of 1968656071 in words is "one billion, nine hundred sixty-eight million, six hundred fifty-six thousand, seventy-one".