43688536687 has 2 divisors, whose sum is σ = 43688536688. Its totient is φ = 43688536686.

The previous prime is 43688536649. The next prime is 43688536693. The reversal of 43688536687 is 78663588634.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43688536687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43688536187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21844268343 + 21844268344.

It is an arithmetic number, because the mean of its divisors is an integer number (21844268344).

Almost surely, 2^43688536687 is an apocalyptic number.

43688536687 is a deficient number, since it is larger than the sum of its proper divisors (1).

43688536687 is an equidigital number, since it uses as much as digits as its factorization.

43688536687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139345920, while the sum is 64.

The spelling of 43688536687 in words is "forty-three billion, six hundred eighty-eight million, five hundred thirty-six thousand, six hundred eighty-seven".