138576187 has 8 divisors (see below), whose sum is σ = 142178400. Its totient is φ = 134984640.

The previous prime is 138576131. The next prime is 138576203. The reversal of 138576187 is 781675831.

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 138576187 - 2⁷ = 138576059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138576787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28189 + ... + 32737.

It is an arithmetic number, because the mean of its divisors is an integer number (17772300).

Almost surely, 2^138576187 is an apocalyptic number.

138576187 is a deficient number, since it is larger than the sum of its proper divisors (3602213).

138576187 is an equidigital number, since it uses as much as digits as its factorization.

138576187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5333.

The product of its digits is 282240, while the sum is 46.

The square root of 138576187 is about 11771.8387263843. The cubic root of 138576187 is about 517.4831372912.

The spelling of 138576187 in words is "one hundred thirty-eight million, five hundred seventy-six thousand, one hundred eighty-seven".