138568711 has 4 divisors (see below), whose sum is σ = 138718800. Its totient is φ = 138418624.

The previous prime is 138568709. The next prime is 138568723. The reversal of 138568711 is 117865831.

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

It is a cyclic number.

It is not a de Polignac number, because 138568711 - 2¹ = 138568709 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 (138568211) 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, 73651 + ... + 75508.

It is an arithmetic number, because the mean of its divisors is an integer number (34679700).

Almost surely, 2^138568711 is an apocalyptic number.

138568711 is a deficient number, since it is larger than the sum of its proper divisors (150089).

138568711 is an equidigital number, since it uses as much as digits as its factorization.

138568711 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150088.

The product of its digits is 40320, while the sum is 40.

The square root of 138568711 is about 11771.5211846218. The cubic root of 138568711 is about 517.4738312827.

The spelling of 138568711 in words is "one hundred thirty-eight million, five hundred sixty-eight thousand, seven hundred eleven".