138911759 has 4 divisors (see below), whose sum is σ = 158756304. Its totient is φ = 119067216.

The previous prime is 138911741. The next prime is 138911761. The reversal of 138911759 is 957119831.

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 138911759 - 2⁸ = 138911503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138911779) 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, 9922262 + ... + 9922275.

It is an arithmetic number, because the mean of its divisors is an integer number (39689076).

Almost surely, 2^138911759 is an apocalyptic number.

138911759 is a deficient number, since it is larger than the sum of its proper divisors (19844545).

138911759 is an equidigital number, since it uses as much as digits as its factorization.

138911759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19844544.

The product of its digits is 68040, while the sum is 44.

The square root of 138911759 is about 11786.0832764748. The cubic root of 138911759 is about 517.9005078666.

The spelling of 138911759 in words is "one hundred thirty-eight million, nine hundred eleven thousand, seven hundred fifty-nine".