8218861487 has 2 divisors, whose sum is σ = 8218861488. Its totient is φ = 8218861486.

The previous prime is 8218861457. The next prime is 8218861489. The reversal of 8218861487 is 7841688128.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8218861487 - 2¹⁶ = 8218795951 is a prime.

Together with 8218861489, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8218861489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4109430743 + 4109430744.

It is an arithmetic number, because the mean of its divisors is an integer number (4109430744).

Almost surely, 2^8218861487 is an apocalyptic number.

8218861487 is a deficient number, since it is larger than the sum of its proper divisors (1).

8218861487 is an equidigital number, since it uses as much as digits as its factorization.

8218861487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1376256, while the sum is 53.

The square root of 8218861487 is about 90657.9367016479. The cubic root of 8218861487 is about 2018.0746192502.

The spelling of 8218861487 in words is "eight billion, two hundred eighteen million, eight hundred sixty-one thousand, four hundred eighty-seven".