68939147 has 2 divisors, whose sum is σ = 68939148. Its totient is φ = 68939146.

The previous prime is 68939141. The next prime is 68939159. The reversal of 68939147 is 74193986.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68939147 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68939141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34469573 + 34469574.

It is an arithmetic number, because the mean of its divisors is an integer number (34469574).

Almost surely, 2^68939147 is an apocalyptic number.

68939147 is a deficient number, since it is larger than the sum of its proper divisors (1).

68939147 is an equidigital number, since it uses as much as digits as its factorization.

68939147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 47.

The square root of 68939147 is about 8302.9601347953. The cubic root of 68939147 is about 410.0359813752.

The spelling of 68939147 in words is "sixty-eight million, nine hundred thirty-nine thousand, one hundred forty-seven".