138836055 has 8 divisors (see below), whose sum is σ = 222137712. Its totient is φ = 74045888.

The previous prime is 138836051. The next prime is 138836057. The reversal of 138836055 is 550638831.

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 138836055 - 2² = 138836051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138836051) 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, 4627854 + ... + 4627883.

It is an arithmetic number, because the mean of its divisors is an integer number (27767214).

Almost surely, 2^138836055 is an apocalyptic number.

138836055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

138836055 is a deficient number, since it is larger than the sum of its proper divisors (83301657).

138836055 is an equidigital number, since it uses as much as digits as its factorization.

138836055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9255745.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 138836055 is about 11782.8712544948. The cubic root of 138836055 is about 517.8064091264.

The spelling of 138836055 in words is "one hundred thirty-eight million, eight hundred thirty-six thousand, fifty-five".