138175523 has 8 divisors (see below), whose sum is σ = 138996000. Its totient is φ = 137358208.

The previous prime is 138175511. The next prime is 138175561. The reversal of 138175523 is 325571831.

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 138175523 - 2¹⁶ = 138109987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138175223) 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 7 ways as a sum of consecutive naturals, for example, 230378 + ... + 230976.

It is an arithmetic number, because the mean of its divisors is an integer number (17374500).

Almost surely, 2^138175523 is an apocalyptic number.

138175523 is a deficient number, since it is larger than the sum of its proper divisors (820477).

138175523 is an equidigital number, since it uses as much as digits as its factorization.

138175523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its digits is 25200, while the sum is 35.

The square root of 138175523 is about 11754.8085054585. The cubic root of 138175523 is about 516.9839245152.

The spelling of 138175523 in words is "one hundred thirty-eight million, one hundred seventy-five thousand, five hundred twenty-three".