138070711 has 4 divisors (see below), whose sum is σ = 142831800. Its totient is φ = 133309624.

The previous prime is 138070697. The next prime is 138070727. The reversal of 138070711 is 117070831.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138070711 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138070711.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138070111) 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, 2380501 + ... + 2380558.

It is an arithmetic number, because the mean of its divisors is an integer number (35707950).

Almost surely, 2^138070711 is an apocalyptic number.

138070711 is a deficient number, since it is larger than the sum of its proper divisors (4761089).

138070711 is an equidigital number, since it uses as much as digits as its factorization.

138070711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4761088.

The product of its (nonzero) digits is 1176, while the sum is 28.

The square root of 138070711 is about 11750.3493990604. The cubic root of 138070711 is about 516.8531733649.

The spelling of 138070711 in words is "one hundred thirty-eight million, seventy thousand, seven hundred eleven".