68139283 has 2 divisors, whose sum is σ = 68139284. Its totient is φ = 68139282.

The previous prime is 68139259. The next prime is 68139287. The reversal of 68139283 is 38293186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68139283 - 2⁵ = 68139251 is a prime.

It is not a weakly prime, because it can be changed into another prime (68139287) 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, 34069641 + 34069642.

It is an arithmetic number, because the mean of its divisors is an integer number (34069642).

Almost surely, 2^68139283 is an apocalyptic number.

68139283 is a deficient number, since it is larger than the sum of its proper divisors (1).

68139283 is an equidigital number, since it uses as much as digits as its factorization.

68139283 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 68139283 is about 8254.6522034547. The cubic root of 68139283 is about 408.4439991408.

The spelling of 68139283 in words is "sixty-eight million, one hundred thirty-nine thousand, two hundred eighty-three".