139705079 has 2 divisors, whose sum is σ = 139705080. Its totient is φ = 139705078.

The previous prime is 139705039. The next prime is 139705109. The reversal of 139705079 is 970507931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 139705079 - 2¹⁶ = 139639543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139705039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69852539 + 69852540.

It is an arithmetic number, because the mean of its divisors is an integer number (69852540).

Almost surely, 2^139705079 is an apocalyptic number.

139705079 is a deficient number, since it is larger than the sum of its proper divisors (1).

139705079 is an equidigital number, since it uses as much as digits as its factorization.

139705079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 59535, while the sum is 41.

The square root of 139705079 is about 11819.6903089717. The cubic root of 139705079 is about 518.8845406293.

The spelling of 139705079 in words is "one hundred thirty-nine million, seven hundred five thousand, seventy-nine".