138513343 has 4 divisors (see below), whose sum is σ = 138582360. Its totient is φ = 138444328.

The previous prime is 138513341. The next prime is 138513379. The reversal of 138513343 is 343315831.

138513343 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: 343315831 = 1459 ⋅235309.

It is a cyclic number.

It is not a de Polignac number, because 138513343 - 2¹ = 138513341 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 (138513341) 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, 31405 + ... + 35542.

It is an arithmetic number, because the mean of its divisors is an integer number (34645590).

Almost surely, 2^138513343 is an apocalyptic number.

138513343 is a deficient number, since it is larger than the sum of its proper divisors (69017).

138513343 is an equidigital number, since it uses as much as digits as its factorization.

138513343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69016.

The product of its digits is 12960, while the sum is 31.

The square root of 138513343 is about 11769.1691720359. The cubic root of 138513343 is about 517.4048996366.

The spelling of 138513343 in words is "one hundred thirty-eight million, five hundred thirteen thousand, three hundred forty-three".