8640470687 has 2 divisors, whose sum is σ = 8640470688. Its totient is φ = 8640470686.

The previous prime is 8640470681. The next prime is 8640470693. The reversal of 8640470687 is 7860740468.

It is a balanced prime because it is at equal distance from previous prime (8640470681) and next prime (8640470693).

It is a cyclic number.

It is not a de Polignac number, because 8640470687 - 2²⁴ = 8623693471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8640470681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4320235343 + 4320235344.

It is an arithmetic number, because the mean of its divisors is an integer number (4320235344).

Almost surely, 2^8640470687 is an apocalyptic number.

8640470687 is a deficient number, since it is larger than the sum of its proper divisors (1).

8640470687 is an equidigital number, since it uses as much as digits as its factorization.

8640470687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1806336, while the sum is 50.

The square root of 8640470687 is about 92954.1321674298. The cubic root of 8640470687 is about 2052.0083975321.

The spelling of 8640470687 in words is "eight billion, six hundred forty million, four hundred seventy thousand, six hundred eighty-seven".