138760855 has 4 divisors (see below), whose sum is σ = 166513032. Its totient is φ = 111008680.

The previous prime is 138760829. The next prime is 138760859. The reversal of 138760855 is 558067831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558067831 = 12119 ⋅46049.

It is not a de Polignac number, because 138760855 - 2⁵ = 138760823 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 (138760859) 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, 13876081 + ... + 13876090.

It is an arithmetic number, because the mean of its divisors is an integer number (41628258).

Almost surely, 2^138760855 is an apocalyptic number.

138760855 is a deficient number, since it is larger than the sum of its proper divisors (27752177).

138760855 is an equidigital number, since it uses as much as digits as its factorization.

138760855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27752176.

The product of its (nonzero) digits is 201600, while the sum is 43.

The square root of 138760855 is about 11779.6797494669. The cubic root of 138760855 is about 517.7129029776.

The spelling of 138760855 in words is "one hundred thirty-eight million, seven hundred sixty thousand, eight hundred fifty-five".