135649247 has 4 divisors (see below), whose sum is σ = 135732480. Its totient is φ = 135566016.

The previous prime is 135649237. The next prime is 135649253. The reversal of 135649247 is 742946531.

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

It is a cyclic number.

It is not a de Polignac number, because 135649247 - 2⁴ = 135649231 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 (135649237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39122 + ... + 42447.

It is an arithmetic number, because the mean of its divisors is an integer number (33933120).

Almost surely, 2^135649247 is an apocalyptic number.

135649247 is a deficient number, since it is larger than the sum of its proper divisors (83233).

135649247 is an equidigital number, since it uses as much as digits as its factorization.

135649247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83232.

The product of its digits is 181440, while the sum is 41.

The square root of 135649247 is about 11646.8556700940. The cubic root of 135649247 is about 513.8138371587.

The spelling of 135649247 in words is "one hundred thirty-five million, six hundred forty-nine thousand, two hundred forty-seven".