138108455 has 4 divisors (see below), whose sum is σ = 165730152. Its totient is φ = 110486760.

The previous prime is 138108437. The next prime is 138108461. The reversal of 138108455 is 554801831.

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

It is not a de Polignac number, because 138108455 - 2⁸ = 138108199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13810841 + ... + 13810850.

It is an arithmetic number, because the mean of its divisors is an integer number (41432538).

Almost surely, 2^138108455 is an apocalyptic number.

138108455 is a deficient number, since it is larger than the sum of its proper divisors (27621697).

138108455 is an equidigital number, since it uses as much as digits as its factorization.

138108455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27621696.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 138108455 is about 11751.9553692141. The cubic root of 138108455 is about 516.9002659710.

The spelling of 138108455 in words is "one hundred thirty-eight million, one hundred eight thousand, four hundred fifty-five".