138535311 has 8 divisors (see below), whose sum is σ = 190672384. Its totient is φ = 89377560.

The previous prime is 138535277. The next prime is 138535339. The reversal of 138535311 is 113535831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138535311 - 2⁶ = 138535247 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 (138535391) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 744721 + ... + 744906.

It is an arithmetic number, because the mean of its divisors is an integer number (23834048).

Almost surely, 2^138535311 is an apocalyptic number.

138535311 is a deficient number, since it is larger than the sum of its proper divisors (52137073).

138535311 is a wasteful number, since it uses less digits than its factorization.

138535311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489661.

The product of its digits is 5400, while the sum is 30.

The square root of 138535311 is about 11770.1024209647. The cubic root of 138535311 is about 517.4322513938.

The spelling of 138535311 in words is "one hundred thirty-eight million, five hundred thirty-five thousand, three hundred eleven".