138500325 has 18 divisors (see below), whose sum is σ = 248069874. Its totient is φ = 73866720.

The previous prime is 138500321. The next prime is 138500333. The reversal of 138500325 is 523005831.

138500325 is a `hidden beast` number, since 138 + 500 + 3 + 25 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 7306209 + 131194116 = 2703^2 + 11454^2 .

It is not a de Polignac number, because 138500325 - 2² = 138500321 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138500321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 307554 + ... + 308003.

Almost surely, 2^138500325 is an apocalyptic number.

138500325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138500325 is a deficient number, since it is larger than the sum of its proper divisors (109569549).

138500325 is a wasteful number, since it uses less digits than its factorization.

138500325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615573 (or 615565 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 138500325 is about 11768.6161038586. The cubic root of 138500325 is about 517.3886899154.

The spelling of 138500325 in words is "one hundred thirty-eight million, five hundred thousand, three hundred twenty-five".