8136728243 has 4 divisors (see below), whose sum is σ = 9299118000. Its totient is φ = 6974338488.

The previous prime is 8136728231. The next prime is 8136728261. The reversal of 8136728243 is 3428276318.

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 8136728243 - 2⁴ = 8136728227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8136728194 and 8136728203.

It is not an unprimeable number, because it can be changed into a prime (8136628243) 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, 581194868 + ... + 581194881.

It is an arithmetic number, because the mean of its divisors is an integer number (2324779500).

Almost surely, 2^8136728243 is an apocalyptic number.

8136728243 is a deficient number, since it is larger than the sum of its proper divisors (1162389757).

8136728243 is a wasteful number, since it uses less digits than its factorization.

8136728243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1162389756.

The product of its digits is 387072, while the sum is 44.

The square root of 8136728243 is about 90203.8150135569. The cubic root of 8136728243 is about 2011.3297178047.

The spelling of 8136728243 in words is "eight billion, one hundred thirty-six million, seven hundred twenty-eight thousand, two hundred forty-three".