138025079 has 2 divisors, whose sum is σ = 138025080. Its totient is φ = 138025078.

The previous prime is 138025073. The next prime is 138025117. The reversal of 138025079 is 970520831.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138025079 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 (138025073) 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, 69012539 + 69012540.

It is an arithmetic number, because the mean of its divisors is an integer number (69012540).

Almost surely, 2^138025079 is an apocalyptic number.

138025079 is a deficient number, since it is larger than the sum of its proper divisors (1).

138025079 is an equidigital number, since it uses as much as digits as its factorization.

138025079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 138025079 is about 11748.4075091052. The cubic root of 138025079 is about 516.7962275614.

It can be divided in two parts, 13802 and 5079, that added together give a palindrome (18881).

The spelling of 138025079 in words is "one hundred thirty-eight million, twenty-five thousand, seventy-nine".