8434884389 has 2 divisors, whose sum is σ = 8434884390. Its totient is φ = 8434884388.

The previous prime is 8434884331. The next prime is 8434884397. The reversal of 8434884389 is 9834884348.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8256448225 + 178436164 = 90865^2 + 13358^2 .

It is a cyclic number.

It is not a de Polignac number, because 8434884389 - 2¹⁶ = 8434818853 is a prime.

It is a super-2 number, since 2×8434884389² (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 (8434886389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4217442194 + 4217442195.

It is an arithmetic number, because the mean of its divisors is an integer number (4217442195).

Almost surely, 2^8434884389 is an apocalyptic number.

It is an amenable number.

8434884389 is a deficient number, since it is larger than the sum of its proper divisors (1).

8434884389 is an equidigital number, since it uses as much as digits as its factorization.

8434884389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21233664, while the sum is 59.

The square root of 8434884389 is about 91841.6266678678. The cubic root of 8434884389 is about 2035.6028244654.

The spelling of 8434884389 in words is "eight billion, four hundred thirty-four million, eight hundred eighty-four thousand, three hundred eighty-nine".