135250013 has 4 divisors (see below), whose sum is σ = 135457788. Its totient is φ = 135042240.

The previous prime is 135249929. The next prime is 135250043. The reversal of 135250013 is 310052531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65577604 + 69672409 = 8098^2 + 8347^2 .

It is a cyclic number.

It is not a de Polignac number, because 135250013 - 2²² = 131055709 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 (135250043) 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, 102908 + ... + 104213.

It is an arithmetic number, because the mean of its divisors is an integer number (33864447).

Almost surely, 2^135250013 is an apocalyptic number.

It is an amenable number.

135250013 is a deficient number, since it is larger than the sum of its proper divisors (207775).

135250013 is an equidigital number, since it uses as much as digits as its factorization.

135250013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207774.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 135250013 is about 11629.7039085266. The cubic root of 135250013 is about 513.3092673918.

The spelling of 135250013 in words is "one hundred thirty-five million, two hundred fifty thousand, thirteen".