135659549 has 4 divisors (see below), whose sum is σ = 136976736. Its totient is φ = 134342364.

The previous prime is 135659533. The next prime is 135659561. The reversal of 135659549 is 945956531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 945956531 = 13 ⋅72765887.

It is a cyclic number.

It is not a de Polignac number, because 135659549 - 2⁴ = 135659533 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 (135659569) 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, 658439 + ... + 658644.

It is an arithmetic number, because the mean of its divisors is an integer number (34244184).

Almost surely, 2^135659549 is an apocalyptic number.

It is an amenable number.

135659549 is a deficient number, since it is larger than the sum of its proper divisors (1317187).

135659549 is a wasteful number, since it uses less digits than its factorization.

135659549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1317186.

The product of its digits is 729000, while the sum is 47.

The square root of 135659549 is about 11647.2979269872. The cubic root of 135659549 is about 513.8268441757.

The spelling of 135659549 in words is "one hundred thirty-five million, six hundred fifty-nine thousand, five hundred forty-nine".