138434713 has 4 divisors (see below), whose sum is σ = 138458320. Its totient is φ = 138411108.

The previous prime is 138434711. The next prime is 138434717. The reversal of 138434713 is 317434831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 317434831 = 7 ⋅45347833.

It is a cyclic number.

It is not a de Polignac number, because 138434713 - 2¹ = 138434711 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138434711) 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, 4498 + ... + 17236.

It is an arithmetic number, because the mean of its divisors is an integer number (34614580).

Almost surely, 2^138434713 is an apocalyptic number.

It is an amenable number.

138434713 is a deficient number, since it is larger than the sum of its proper divisors (23607).

138434713 is a wasteful number, since it uses less digits than its factorization.

138434713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23606.

The product of its digits is 24192, while the sum is 34.

The square root of 138434713 is about 11765.8281901445. The cubic root of 138434713 is about 517.3069758624.

The spelling of 138434713 in words is "one hundred thirty-eight million, four hundred thirty-four thousand, seven hundred thirteen".