138711 has 4 divisors (see below), whose sum is σ = 184952. Its totient is φ = 92472.

The previous prime is 138683. The next prime is 138727. The reversal of 138711 is 117831.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 138711 - 2⁵ = 138679 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 138711.

It is not an unprimeable number, because it can be changed into a prime (138731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23116 + ... + 23121.

It is an arithmetic number, because the mean of its divisors is an integer number (46238).

2¹³⁸⁷¹¹ is an apocalyptic number.

138711 is a deficient number, since it is larger than the sum of its proper divisors (46241).

138711 is an equidigital number, since it uses as much as digits as its factorization.

138711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46240.

The product of its digits is 168, while the sum is 21.

The square root of 138711 is about 372.4392567923. The cubic root of 138711 is about 51.7650893010.

The spelling of 138711 in words is "one hundred thirty-eight thousand, seven hundred eleven".