138860339 has 4 divisors (see below), whose sum is σ = 141136800. Its totient is φ = 136583880.

The previous prime is 138860329. The next prime is 138860347. The reversal of 138860339 is 933068831.

138860339 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 933068831 = 27779 ⋅33589.

It is not a de Polignac number, because 138860339 - 2⁸ = 138860083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138860296 and 138860305.

It is not an unprimeable number, because it can be changed into a prime (138860329) 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, 1138139 + ... + 1138260.

It is an arithmetic number, because the mean of its divisors is an integer number (35284200).

Almost surely, 2^138860339 is an apocalyptic number.

138860339 is a deficient number, since it is larger than the sum of its proper divisors (2276461).

138860339 is an equidigital number, since it uses as much as digits as its factorization.

138860339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2276460.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 138860339 is about 11783.9016883204. The cubic root of 138860339 is about 517.8365974369.

The spelling of 138860339 in words is "one hundred thirty-eight million, eight hundred sixty thousand, three hundred thirty-nine".