138616771 has 8 divisors (see below), whose sum is σ = 142101504. Its totient is φ = 135154440.

The previous prime is 138616757. The next prime is 138616787. The reversal of 138616771 is 177616831.

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 138616771 - 2¹³ = 138608579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138611771) 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, 7296 + ... + 18178.

It is an arithmetic number, because the mean of its divisors is an integer number (17762688).

Almost surely, 2^138616771 is an apocalyptic number.

138616771 is a deficient number, since it is larger than the sum of its proper divisors (3484733).

138616771 is a wasteful number, since it uses less digits than its factorization.

138616771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11201.

The product of its digits is 42336, while the sum is 40.

The square root of 138616771 is about 11773.5623750843. The cubic root of 138616771 is about 517.5336497836.

The spelling of 138616771 in words is "one hundred thirty-eight million, six hundred sixteen thousand, seven hundred seventy-one".