135811389 has 24 divisors (see below), whose sum is σ = 219810240. Its totient is φ = 74230464.

The previous prime is 135811339. The next prime is 135811391. The reversal of 135811389 is 983118531.

It is not a de Polignac number, because 135811389 - 2⁷ = 135811261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135811309) 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 23 ways as a sum of consecutive naturals, for example, 16704 + ... + 23465.

It is an arithmetic number, because the mean of its divisors is an integer number (9158760).

Almost surely, 2^135811389 is an apocalyptic number.

It is an amenable number.

135811389 is a deficient number, since it is larger than the sum of its proper divisors (83998851).

135811389 is a wasteful number, since it uses less digits than its factorization.

135811389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40209 (or 40202 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 135811389 is about 11653.8143541074. The cubic root of 135811389 is about 514.0184767793.

The spelling of 135811389 in words is "one hundred thirty-five million, eight hundred eleven thousand, three hundred eighty-nine".