135243370243 has 4 divisors (see below), whose sum is σ = 135944113288. Its totient is φ = 134542627200.

The previous prime is 135243370219. The next prime is 135243370247. The reversal of 135243370243 is 342073342531.

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 135243370243 - 2²⁹ = 134706499331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135243370247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350371233 + ... + 350371618.

It is an arithmetic number, because the mean of its divisors is an integer number (33986028322).

Almost surely, 2^135243370243 is an apocalyptic number.

135243370243 is a deficient number, since it is larger than the sum of its proper divisors (700743045).

135243370243 is an equidigital number, since it uses as much as digits as its factorization.

135243370243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700743044.

The product of its (nonzero) digits is 181440, while the sum is 37.

The spelling of 135243370243 in words is "one hundred thirty-five billion, two hundred forty-three million, three hundred seventy thousand, two hundred forty-three".