138118727 has 8 divisors (see below), whose sum is σ = 147063600. Its totient is φ = 129265024.

The previous prime is 138118711. The next prime is 138118769. The reversal of 138118727 is 727811831.

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 138118727 - 2⁴ = 138118711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138114727) 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, 19652 + ... + 25737.

It is an arithmetic number, because the mean of its divisors is an integer number (18382950).

Almost surely, 2^138118727 is an apocalyptic number.

138118727 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

138118727 is a deficient number, since it is larger than the sum of its proper divisors (8944873).

138118727 is a wasteful number, since it uses less digits than its factorization.

138118727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45585.

The product of its digits is 18816, while the sum is 38.

The square root of 138118727 is about 11752.3923947424. The cubic root of 138118727 is about 516.9130807015.

The spelling of 138118727 in words is "one hundred thirty-eight million, one hundred eighteen thousand, seven hundred twenty-seven".