139367539 has 2 divisors, whose sum is σ = 139367540. Its totient is φ = 139367538.

The previous prime is 139367519. The next prime is 139367561. The reversal of 139367539 is 935763931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139367539 - 2⁵ = 139367507 is a prime.

It is not a weakly prime, because it can be changed into another prime (139367519) 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, 69683769 + 69683770.

It is an arithmetic number, because the mean of its divisors is an integer number (69683770).

Almost surely, 2^139367539 is an apocalyptic number.

139367539 is a deficient number, since it is larger than the sum of its proper divisors (1).

139367539 is an equidigital number, since it uses as much as digits as its factorization.

139367539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 459270, while the sum is 46.

The square root of 139367539 is about 11805.4029579680. The cubic root of 139367539 is about 518.4663130948.

The spelling of 139367539 in words is "one hundred thirty-nine million, three hundred sixty-seven thousand, five hundred thirty-nine".