138108487 has 8 divisors (see below), whose sum is σ = 151998480. Its totient is φ = 124440960.

The previous prime is 138108463. The next prime is 138108517. The reversal of 138108487 is 784801831.

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 138108487 - 2¹⁵ = 138075719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138108437) 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, 54312 + ... + 56797.

It is an arithmetic number, because the mean of its divisors is an integer number (18999810).

Almost surely, 2^138108487 is an apocalyptic number.

138108487 is a deficient number, since it is larger than the sum of its proper divisors (13889993).

138108487 is a wasteful number, since it uses less digits than its factorization.

138108487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111233.

The product of its (nonzero) digits is 43008, while the sum is 40.

The square root of 138108487 is about 11751.9567306896. The cubic root of 138108487 is about 516.9003058933.

The spelling of 138108487 in words is "one hundred thirty-eight million, one hundred eight thousand, four hundred eighty-seven".