68379139 has 2 divisors, whose sum is σ = 68379140. Its totient is φ = 68379138.

The previous prime is 68379133. The next prime is 68379167. The reversal of 68379139 is 93197386.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68379139 - 2³ = 68379131 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68379131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34189569 + 34189570.

It is an arithmetic number, because the mean of its divisors is an integer number (34189570).

Almost surely, 2^68379139 is an apocalyptic number.

68379139 is a deficient number, since it is larger than the sum of its proper divisors (1).

68379139 is an equidigital number, since it uses as much as digits as its factorization.

68379139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 46.

The square root of 68379139 is about 8269.1679750746. The cubic root of 68379139 is about 408.9226902974.

The spelling of 68379139 in words is "sixty-eight million, three hundred seventy-nine thousand, one hundred thirty-nine".