68696987 has 2 divisors, whose sum is σ = 68696988. Its totient is φ = 68696986.

The previous prime is 68696981. The next prime is 68697029. The reversal of 68696987 is 78969686.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68696987 - 2⁸ = 68696731 is a prime.

It is not a weakly prime, because it can be changed into another prime (68696981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34348493 + 34348494.

It is an arithmetic number, because the mean of its divisors is an integer number (34348494).

Almost surely, 2^68696987 is an apocalyptic number.

68696987 is a deficient number, since it is larger than the sum of its proper divisors (1).

68696987 is an equidigital number, since it uses as much as digits as its factorization.

68696987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7838208, while the sum is 59.

The square root of 68696987 is about 8288.3645552063. The cubic root of 68696987 is about 409.5553120338. Note that the first 3 decimals are identical.

The spelling of 68696987 in words is "sixty-eight million, six hundred ninety-six thousand, nine hundred eighty-seven".