8247039641 has 4 divisors (see below), whose sum is σ = 8249080500. Its totient is φ = 8244998784.

The previous prime is 8247039611. The next prime is 8247039683. The reversal of 8247039641 is 1469307428.

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 695429641 + 7551610000 = 26371^2 + 86900^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8247039641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8247039592 and 8247039601.

It is not an unprimeable number, because it can be changed into a prime (8247039611) 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, 1014356 + ... + 1022453.

It is an arithmetic number, because the mean of its divisors is an integer number (2062270125).

Almost surely, 2^8247039641 is an apocalyptic number.

It is an amenable number.

8247039641 is a deficient number, since it is larger than the sum of its proper divisors (2040859).

8247039641 is a wasteful number, since it uses less digits than its factorization.

8247039641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2040858.

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 8247039641 is about 90813.2129208080. The cubic root of 8247039641 is about 2020.3782940987.

The spelling of 8247039641 in words is "eight billion, two hundred forty-seven million, thirty-nine thousand, six hundred forty-one".