138475307 has 8 divisors (see below), whose sum is σ = 141075792. Its totient is φ = 135885600.

The previous prime is 138475303. The next prime is 138475313. The reversal of 138475307 is 703574831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138475307 - 2² = 138475303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138475303) 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 in 7 ways as a sum of consecutive naturals, for example, 26057 + ... + 30917.

It is an arithmetic number, because the mean of its divisors is an integer number (17634474).

Almost surely, 2^138475307 is an apocalyptic number.

138475307 is a deficient number, since it is larger than the sum of its proper divisors (2600485).

138475307 is an equidigital number, since it uses as much as digits as its factorization.

138475307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5389.

The product of its (nonzero) digits is 70560, while the sum is 38.

The square root of 138475307 is about 11767.5531441332. The cubic root of 138475307 is about 517.3575352119.

The spelling of 138475307 in words is "one hundred thirty-eight million, four hundred seventy-five thousand, three hundred seven".