8486887621 has 2 divisors, whose sum is σ = 8486887622. Its totient is φ = 8486887620.

The previous prime is 8486887609. The next prime is 8486887631. The reversal of 8486887621 is 1267886848.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7283769025 + 1203118596 = 85345^2 + 34686^2 .

It is a cyclic number.

It is not a de Polignac number, because 8486887621 - 2¹¹ = 8486885573 is a prime.

It is a super-2 number, since 2×8486887621² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8486887631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4243443810 + 4243443811.

It is an arithmetic number, because the mean of its divisors is an integer number (4243443811).

Almost surely, 2^8486887621 is an apocalyptic number.

It is an amenable number.

8486887621 is a deficient number, since it is larger than the sum of its proper divisors (1).

8486887621 is an equidigital number, since it uses as much as digits as its factorization.

8486887621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8257536, while the sum is 58.

The square root of 8486887621 is about 92124.3052673940. The cubic root of 8486887621 is about 2039.7775950189. Note that the first 3 decimals are identical.

The spelling of 8486887621 in words is "eight billion, four hundred eighty-six million, eight hundred eighty-seven thousand, six hundred twenty-one".