138335911 has 4 divisors (see below), whose sum is σ = 158098192. Its totient is φ = 118573632.

The previous prime is 138335909. The next prime is 138335929. The reversal of 138335911 is 119533831.

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 138335911 - 2¹ = 138335909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138335111) 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, 9881130 + ... + 9881143.

It is an arithmetic number, because the mean of its divisors is an integer number (39524548).

Almost surely, 2^138335911 is an apocalyptic number.

138335911 is a deficient number, since it is larger than the sum of its proper divisors (19762281).

138335911 is an equidigital number, since it uses as much as digits as its factorization.

138335911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19762280.

The product of its digits is 9720, while the sum is 34.

The square root of 138335911 is about 11761.6287562565. The cubic root of 138335911 is about 517.1838778162.

The spelling of 138335911 in words is "one hundred thirty-eight million, three hundred thirty-five thousand, nine hundred eleven".