8343521887 has 2 divisors, whose sum is σ = 8343521888. Its totient is φ = 8343521886.

The previous prime is 8343521869. The next prime is 8343521909. The reversal of 8343521887 is 7881253438.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8343521887 - 2⁷ = 8343521759 is a prime.

It is a super-4 number, since 4×8343521887⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3, 2.

It is a self number, because there is not a number n which added to its sum of digits gives 8343521887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8343521387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4171760943 + 4171760944.

It is an arithmetic number, because the mean of its divisors is an integer number (4171760944).

Almost surely, 2^8343521887 is an apocalyptic number.

8343521887 is a deficient number, since it is larger than the sum of its proper divisors (1).

8343521887 is an equidigital number, since it uses as much as digits as its factorization.

8343521887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1290240, while the sum is 49.

The square root of 8343521887 is about 91342.8808774937. The cubic root of 8343521887 is about 2028.2265799067.

The spelling of 8343521887 in words is "eight billion, three hundred forty-three million, five hundred twenty-one thousand, eight hundred eighty-seven".