139028039 has 2 divisors, whose sum is σ = 139028040. Its totient is φ = 139028038.

The previous prime is 139028033. The next prime is 139028051. The reversal of 139028039 is 930820931.

It is a weak prime.

It is an emirp because it is prime and its reverse (930820931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 139028039 - 2²⁴ = 122250823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139028033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69514019 + 69514020.

It is an arithmetic number, because the mean of its divisors is an integer number (69514020).

Almost surely, 2^139028039 is an apocalyptic number.

139028039 is a deficient number, since it is larger than the sum of its proper divisors (1).

139028039 is an equidigital number, since it uses as much as digits as its factorization.

139028039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 139028039 is about 11791.0151810605. The cubic root of 139028039 is about 518.0449752992.

The spelling of 139028039 in words is "one hundred thirty-nine million, twenty-eight thousand, thirty-nine".