135811357 has 4 divisors (see below), whose sum is σ = 148157856. Its totient is φ = 123464860.

The previous prime is 135811339. The next prime is 135811391. The reversal of 135811357 is 753118531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135811357 - 2²³ = 127422749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135811307) 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, 6173233 + ... + 6173254.

It is an arithmetic number, because the mean of its divisors is an integer number (37039464).

Almost surely, 2^135811357 is an apocalyptic number.

It is an amenable number.

135811357 is a deficient number, since it is larger than the sum of its proper divisors (12346499).

135811357 is a wasteful number, since it uses less digits than its factorization.

135811357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12346498.

The product of its digits is 12600, while the sum is 34.

The square root of 135811357 is about 11653.8129811663. The cubic root of 135811357 is about 514.0184364082.

Adding to 135811357 its reverse (753118531), we get a palindrome (888929888).

The spelling of 135811357 in words is "one hundred thirty-five million, eight hundred eleven thousand, three hundred fifty-seven".