8434251689 has 2 divisors, whose sum is σ = 8434251690. Its totient is φ = 8434251688.

The previous prime is 8434251671. The next prime is 8434251691. The reversal of 8434251689 is 9861524348.

8434251689 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5705234089 + 2729017600 = 75533^2 + 52240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8434251689 is a prime.

It is a super-2 number, since 2×8434251689² (a number of 21 digits) contains 22 as substring.

Together with 8434251691, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (8434251629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4217125844 + 4217125845.

It is an arithmetic number, because the mean of its divisors is an integer number (4217125845).

Almost surely, 2^8434251689 is an apocalyptic number.

It is an amenable number.

8434251689 is a deficient number, since it is larger than the sum of its proper divisors (1).

8434251689 is an equidigital number, since it uses as much as digits as its factorization.

8434251689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1658880, while the sum is 50.

The square root of 8434251689 is about 91838.1820867552. The cubic root of 8434251689 is about 2035.5519263913.

The spelling of 8434251689 in words is "eight billion, four hundred thirty-four million, two hundred fifty-one thousand, six hundred eighty-nine".