8402447089 has 2 divisors, whose sum is σ = 8402447090. Its totient is φ = 8402447088.

The previous prime is 8402447071. The next prime is 8402447099. The reversal of 8402447089 is 9807442048.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7026630625 + 1375816464 = 83825^2 + 37092^2 .

It is a cyclic number.

It is not a de Polignac number, because 8402447089 - 2⁵ = 8402447057 is a prime.

It is a super-2 number, since 2×8402447089² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8402447099) 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, 4201223544 + 4201223545.

It is an arithmetic number, because the mean of its divisors is an integer number (4201223545).

Almost surely, 2^8402447089 is an apocalyptic number.

It is an amenable number.

8402447089 is a deficient number, since it is larger than the sum of its proper divisors (1).

8402447089 is an equidigital number, since it uses as much as digits as its factorization.

8402447089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 516096, while the sum is 46.

The square root of 8402447089 is about 91664.8628919500. The cubic root of 8402447089 is about 2032.9900922693.

The spelling of 8402447089 in words is "eight billion, four hundred two million, four hundred forty-seven thousand, eighty-nine".