138747625 has 16 divisors (see below), whose sum is σ = 183345552. Its totient is φ = 104467200.

The previous prime is 138747617. The next prime is 138747641. The reversal of 138747625 is 526747831.

It can be written as a sum of positive squares in 8 ways, for example, as 24920064 + 113827561 = 4992^2 + 10669^2 .

It is not a de Polignac number, because 138747625 - 2³ = 138747617 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, 30522 + ... + 34771.

It is an arithmetic number, because the mean of its divisors is an integer number (11459097).

Almost surely, 2^138747625 is an apocalyptic number.

It is an amenable number.

138747625 is a deficient number, since it is larger than the sum of its proper divisors (44597927).

138747625 is an equidigital number, since it uses as much as digits as its factorization.

138747625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65325 (or 65315 counting only the distinct ones).

The product of its digits is 282240, while the sum is 43.

The square root of 138747625 is about 11779.1181758228. The cubic root of 138747625 is about 517.6964488669.

The spelling of 138747625 in words is "one hundred thirty-eight million, seven hundred forty-seven thousand, six hundred twenty-five".