138587163 has 32 divisors (see below), whose sum is σ = 222980352. Its totient is φ = 75427200.

The previous prime is 138587153. The next prime is 138587171. The reversal of 138587163 is 361785831.

It is not a de Polignac number, because 138587163 - 2⁴ = 138587147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138587153) 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 31 ways as a sum of consecutive naturals, for example, 11508 + ... + 20238.

It is an arithmetic number, because the mean of its divisors is an integer number (6968136).

Almost surely, 2^138587163 is an apocalyptic number.

138587163 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

138587163 is a deficient number, since it is larger than the sum of its proper divisors (84393189).

138587163 is a wasteful number, since it uses less digits than its factorization.

138587163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8795.

The product of its digits is 120960, while the sum is 42.

The square root of 138587163 is about 11772.3049145017. The cubic root of 138587163 is about 517.4967994388.

The spelling of 138587163 in words is "one hundred thirty-eight million, five hundred eighty-seven thousand, one hundred sixty-three".