138341305 has 8 divisors (see below), whose sum is σ = 166541832. Its totient is φ = 110318208.

The previous prime is 138341293. The next prime is 138341311. The reversal of 138341305 is 503143831.

It can be written as a sum of positive squares in 4 ways, for example, as 3154176 + 135187129 = 1776^2 + 11627^2 .

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 138341305 - 2¹³ = 138333113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42634 + ... + 45763.

It is an arithmetic number, because the mean of its divisors is an integer number (20817729).

Almost surely, 2^138341305 is an apocalyptic number.

It is an amenable number.

138341305 is a deficient number, since it is larger than the sum of its proper divisors (28200527).

138341305 is an equidigital number, since it uses as much as digits as its factorization.

138341305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88715.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 138341305 is about 11761.8580589973. The cubic root of 138341305 is about 517.1905997478.

The spelling of 138341305 in words is "one hundred thirty-eight million, three hundred forty-one thousand, three hundred five".