135243844 has 6 divisors (see below), whose sum is σ = 236676734. Its totient is φ = 67621920.

The previous prime is 135243839. The next prime is 135243847. The reversal of 135243844 is 448342531.

It can be written as a sum of positive squares in only one way, i.e., 102616900 + 32626944 = 10130^2 + 5712^2 .

It is not an unprimeable number, because it can be changed into a prime (135243847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16905477 + ... + 16905484.

Almost surely, 2^135243844 is an apocalyptic number.

It is an amenable number.

135243844 is a deficient number, since it is larger than the sum of its proper divisors (101432890).

135243844 is a wasteful number, since it uses less digits than its factorization.

135243844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33810965 (or 33810963 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 135243844 is about 11629.4386794892. The cubic root of 135243844 is about 513.3014629489.

The spelling of 135243844 in words is "one hundred thirty-five million, two hundred forty-three thousand, eight hundred forty-four".