138118625 has 16 divisors (see below), whose sum is σ = 182514384. Its totient is φ = 103993600.

The previous prime is 138118597. The next prime is 138118633. The reversal of 138118625 is 526811831.

It can be written as a sum of positive squares in 8 ways, for example, as 53919649 + 84198976 = 7343^2 + 9176^2 .

It is not a de Polignac number, because 138118625 - 2¹⁶ = 138053089 is a prime.

It is a Duffinian 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 15 ways as a sum of consecutive naturals, for example, 30374 + ... + 34623.

It is an arithmetic number, because the mean of its divisors is an integer number (11407149).

Almost surely, 2^138118625 is an apocalyptic number.

It is an amenable number.

138118625 is a deficient number, since it is larger than the sum of its proper divisors (44395759).

138118625 is an equidigital number, since it uses as much as digits as its factorization.

138118625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65029 (or 65019 counting only the distinct ones).

The product of its digits is 11520, while the sum is 35.

The square root of 138118625 is about 11752.3880551997. The cubic root of 138118625 is about 516.9129534556.

The spelling of 138118625 in words is "one hundred thirty-eight million, one hundred eighteen thousand, six hundred twenty-five".