135133813 has 4 divisors (see below), whose sum is σ = 135198508. Its totient is φ = 135069120.

The previous prime is 135133793. The next prime is 135133819. The reversal of 135133813 is 318331531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 318331531 = 7 ⋅45475933.

It can be written as a sum of positive squares in 2 ways, for example, as 94148209 + 40985604 = 9703^2 + 6402^2 .

It is a cyclic number.

It is not a de Polignac number, because 135133813 - 2²⁵ = 101579381 is a prime.

It is a super-2 number, since 2×135133813² = 36522294831837938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135133819) 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, 29106 + ... + 33427.

It is an arithmetic number, because the mean of its divisors is an integer number (33799627).

Almost surely, 2^135133813 is an apocalyptic number.

It is an amenable number.

135133813 is a deficient number, since it is larger than the sum of its proper divisors (64695).

135133813 is an equidigital number, since it uses as much as digits as its factorization.

135133813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64694.

The product of its digits is 3240, while the sum is 28.

The square root of 135133813 is about 11624.7070070604. The cubic root of 135133813 is about 513.1622221150.

The spelling of 135133813 in words is "one hundred thirty-five million, one hundred thirty-three thousand, eight hundred thirteen".