68188907 has 2 divisors, whose sum is σ = 68188908. Its totient is φ = 68188906.

The previous prime is 68188903. The next prime is 68188909. The reversal of 68188907 is 70988186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68188907 - 2² = 68188903 is a prime.

Together with 68188909, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68188903) 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, 34094453 + 34094454.

It is an arithmetic number, because the mean of its divisors is an integer number (34094454).

Almost surely, 2^68188907 is an apocalyptic number.

68188907 is a deficient number, since it is larger than the sum of its proper divisors (1).

68188907 is an equidigital number, since it uses as much as digits as its factorization.

68188907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 68188907 is about 8257.6574765487. The cubic root of 68188907 is about 408.5431279925.

The spelling of 68188907 in words is "sixty-eight million, one hundred eighty-eight thousand, nine hundred seven".