138872621608087 has 4 divisors (see below), whose sum is σ = 138872651154696. Its totient is φ = 138872592061480.

The previous prime is 138872621608051. The next prime is 138872621608109. The reversal of 138872621608087 is 780806126278831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 138872621608087 - 2⁷ = 138872621607959 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 (138872621605087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5977489 + ... + 17705242.

It is an arithmetic number, because the mean of its divisors is an integer number (34718162788674).

Almost surely, 2^{138872621608087} is an apocalyptic number.

138872621608087 is a deficient number, since it is larger than the sum of its proper divisors (29546609).

138872621608087 is an equidigital number, since it uses as much as digits as its factorization.

138872621608087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29546608.

The product of its (nonzero) digits is 86704128, while the sum is 67.

The spelling of 138872621608087 in words is "one hundred thirty-eight trillion, eight hundred seventy-two billion, six hundred twenty-one million, six hundred eight thousand, eighty-seven".