135311423 has 4 divisors (see below), whose sum is σ = 145720008. Its totient is φ = 124902840.

The previous prime is 135311399. The next prime is 135311447. The reversal of 135311423 is 324113531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324113531 = 7 ⋅46301933.

It is an interprime number because it is at equal distance from previous prime (135311399) and next prime (135311447).

It is a cyclic number.

It is not a de Polignac number, because 135311423 - 2²⁰ = 134262847 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 (135311623) 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, 5204273 + ... + 5204298.

It is an arithmetic number, because the mean of its divisors is an integer number (36430002).

Almost surely, 2^135311423 is an apocalyptic number.

135311423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

135311423 is a deficient number, since it is larger than the sum of its proper divisors (10408585).

135311423 is a wasteful number, since it uses less digits than its factorization.

135311423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10408584.

The product of its digits is 1080, while the sum is 23.

The square root of 135311423 is about 11632.3438308881. The cubic root of 135311423 is about 513.3869446547.

Adding to 135311423 its reverse (324113531), we get a palindrome (459424954).

The spelling of 135311423 in words is "one hundred thirty-five million, three hundred eleven thousand, four hundred twenty-three".