68968786987 has 2 divisors, whose sum is σ = 68968786988. Its totient is φ = 68968786986.

The previous prime is 68968786937. The next prime is 68968787029. The reversal of 68968786987 is 78968786986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68968786987 - 2¹¹ = 68968784939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68968786987.

It is not a weakly prime, because it can be changed into another prime (68968786927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34484393493 + 34484393494.

It is an arithmetic number, because the mean of its divisors is an integer number (34484393494).

Almost surely, 2^68968786987 is an apocalyptic number.

68968786987 is a deficient number, since it is larger than the sum of its proper divisors (1).

68968786987 is an equidigital number, since it uses as much as digits as its factorization.

68968786987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3511517184, while the sum is 82.

Subtracting 68968786987 from its reverse (78968786986), we obtain a palindrome (9999999999).

The spelling of 68968786987 in words is "sixty-eight billion, nine hundred sixty-eight million, seven hundred eighty-six thousand, nine hundred eighty-seven".