8389527481 has 2 divisors, whose sum is σ = 8389527482. Its totient is φ = 8389527480.

The previous prime is 8389527473. The next prime is 8389527547. The reversal of 8389527481 is 1847259838.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7222280256 + 1167247225 = 84984^2 + 34165^2 .

It is a cyclic number.

It is not a de Polignac number, because 8389527481 - 2³ = 8389527473 is a prime.

It is a super-2 number, since 2×8389527481² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8389527431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4194763740 + 4194763741.

It is an arithmetic number, because the mean of its divisors is an integer number (4194763741).

Almost surely, 2^8389527481 is an apocalyptic number.

It is an amenable number.

8389527481 is a deficient number, since it is larger than the sum of its proper divisors (1).

8389527481 is an equidigital number, since it uses as much as digits as its factorization.

8389527481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 55.

The square root of 8389527481 is about 91594.3638058587. The cubic root of 8389527481 is about 2031.9475821446.

The spelling of 8389527481 in words is "eight billion, three hundred eighty-nine million, five hundred twenty-seven thousand, four hundred eighty-one".