139068439 has 2 divisors, whose sum is σ = 139068440. Its totient is φ = 139068438.

The previous prime is 139068403. The next prime is 139068443. The reversal of 139068439 is 934860931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139068439 - 2¹¹ = 139066391 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 139068395 and 139068404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139066439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69534219 + 69534220.

It is an arithmetic number, because the mean of its divisors is an integer number (69534220).

Almost surely, 2^139068439 is an apocalyptic number.

139068439 is a deficient number, since it is larger than the sum of its proper divisors (1).

139068439 is an equidigital number, since it uses as much as digits as its factorization.

139068439 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 139068439 is about 11792.7282254786. The cubic root of 139068439 is about 518.0951498065.

The spelling of 139068439 in words is "one hundred thirty-nine million, sixty-eight thousand, four hundred thirty-nine".