138804755 has 8 divisors (see below), whose sum is σ = 168847872. Its totient is φ = 109522368.

The previous prime is 138804749. The next prime is 138804773. The reversal of 138804755 is 557408831.

138804755 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 138804755 - 2⁴ = 138804739 is a prime.

It is a super-2 number, since 2×138804755² = 38533520021220050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 189779 + ... + 190508.

It is an arithmetic number, because the mean of its divisors is an integer number (21105984).

Almost surely, 2^138804755 is an apocalyptic number.

138804755 is a deficient number, since it is larger than the sum of its proper divisors (30043117).

138804755 is an equidigital number, since it uses as much as digits as its factorization.

138804755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380365.

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 138804755 is about 11781.5429804419. The cubic root of 138804755 is about 517.7674937820.

The spelling of 138804755 in words is "one hundred thirty-eight million, eight hundred four thousand, seven hundred fifty-five".