68969687 has 2 divisors, whose sum is σ = 68969688. Its totient is φ = 68969686.

The previous prime is 68969683. The next prime is 68969689. The reversal of 68969687 is 78696986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68969687 - 2² = 68969683 is a prime.

Together with 68969689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68969683) 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, 34484843 + 34484844.

It is an arithmetic number, because the mean of its divisors is an integer number (34484844).

Almost surely, 2^68969687 is an apocalyptic number.

68969687 is a deficient number, since it is larger than the sum of its proper divisors (1).

68969687 is an equidigital number, since it uses as much as digits as its factorization.

68969687 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 68969687 is about 8304.7990342934. The cubic root of 68969687 is about 410.0965209995.

The spelling of 68969687 in words is "sixty-eight million, nine hundred sixty-nine thousand, six hundred eighty-seven".