138930725 has 6 divisors (see below), whose sum is σ = 172274130. Its totient is φ = 111144560.

The previous prime is 138930719. The next prime is 138930739. The reversal of 138930725 is 527039831.

It can be written as a sum of positive squares in 3 ways, for example, as 3976036 + 134954689 = 1994^2 + 11617^2 .

It is not a de Polignac number, because 138930725 - 2⁴ = 138930709 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 2778590 + ... + 2778639.

It is an arithmetic number, because the mean of its divisors is an integer number (28712355).

Almost surely, 2^138930725 is an apocalyptic number.

It is an amenable number.

138930725 is a deficient number, since it is larger than the sum of its proper divisors (33343405).

138930725 is an equidigital number, since it uses as much as digits as its factorization.

138930725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5557239 (or 5557234 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 138930725 is about 11786.8878420048. The cubic root of 138930725 is about 517.9240769153.

The spelling of 138930725 in words is "one hundred thirty-eight million, nine hundred thirty thousand, seven hundred twenty-five".