8243727145 has 4 divisors (see below), whose sum is σ = 9892472580. Its totient is φ = 6594981712.

The previous prime is 8243727139. The next prime is 8243727157. The reversal of 8243727145 is 5417273428.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1256773401 + 6986953744 = 35451^2 + 83588^2 .

It is a cyclic number.

It is not a de Polignac number, because 8243727145 - 2¹⁹ = 8243202857 is a prime.

It is an unprimeable number.

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, 824372710 + ... + 824372719.

It is an arithmetic number, because the mean of its divisors is an integer number (2473118145).

Almost surely, 2^8243727145 is an apocalyptic number.

It is an amenable number.

8243727145 is a deficient number, since it is larger than the sum of its proper divisors (1648745435).

8243727145 is a wasteful number, since it uses less digits than its factorization.

8243727145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1648745434.

The product of its digits is 376320, while the sum is 43.

The square root of 8243727145 is about 90794.9731262695. The cubic root of 8243727145 is about 2020.1077569709.

The spelling of 8243727145 in words is "eight billion, two hundred forty-three million, seven hundred twenty-seven thousand, one hundred forty-five".