135813753 has 10 divisors (see below), whose sum is σ = 202882394. Its totient is φ = 90542448.

The previous prime is 135813739. The next prime is 135813761. The reversal of 135813753 is 357318531.

It is a happy number.

135813753 is a `hidden beast` number, since 1 + 3 + 581 + 3 + 75 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 79067664 + 56746089 = 8892^2 + 7533^2 .

It is not a de Polignac number, because 135813753 - 2⁵ = 135813721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (135813773) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 838276 + ... + 838437.

Almost surely, 2^135813753 is an apocalyptic number.

It is an amenable number.

135813753 is a deficient number, since it is larger than the sum of its proper divisors (67068641).

135813753 is an equidigital number, since it uses as much as digits as its factorization.

135813753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1676725 (or 1676716 counting only the distinct ones).

The product of its digits is 37800, while the sum is 36.

The square root of 135813753 is about 11653.9157796854. The cubic root of 135813753 is about 514.0214591817.

The spelling of 135813753 in words is "one hundred thirty-five million, eight hundred thirteen thousand, seven hundred fifty-three".