135133123 has 4 divisors (see below), whose sum is σ = 139492288. Its totient is φ = 130773960.

The previous prime is 135133121. The next prime is 135133151. The reversal of 135133123 is 321331531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321331531 = 67 ⋅4795993.

It is a cyclic number.

It is not a de Polignac number, because 135133123 - 2¹ = 135133121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 135133094 and 135133103.

It is not an unprimeable number, because it can be changed into a prime (135133121) 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, 2179536 + ... + 2179597.

It is an arithmetic number, because the mean of its divisors is an integer number (34873072).

Almost surely, 2^135133123 is an apocalyptic number.

135133123 is a deficient number, since it is larger than the sum of its proper divisors (4359165).

135133123 is an equidigital number, since it uses as much as digits as its factorization.

135133123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4359164.

The product of its digits is 810, while the sum is 22.

The square root of 135133123 is about 11624.6773288552. The cubic root of 135133123 is about 513.1613487029.

Adding to 135133123 its reverse (321331531), we get a palindrome (456464654).

The spelling of 135133123 in words is "one hundred thirty-five million, one hundred thirty-three thousand, one hundred twenty-three".