8126899789 has 2 divisors, whose sum is σ = 8126899790. Its totient is φ = 8126899788.

The previous prime is 8126899769. The next prime is 8126899841. The reversal of 8126899789 is 9879986218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8008460100 + 118439689 = 89490^2 + 10883^2 .

It is a cyclic number.

It is not a de Polignac number, because 8126899789 - 2¹¹ = 8126897741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8126899769) 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, 4063449894 + 4063449895.

It is an arithmetic number, because the mean of its divisors is an integer number (4063449895).

Almost surely, 2^8126899789 is an apocalyptic number.

It is an amenable number.

8126899789 is a deficient number, since it is larger than the sum of its proper divisors (1).

8126899789 is an equidigital number, since it uses as much as digits as its factorization.

8126899789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31352832, while the sum is 67.

The square root of 8126899789 is about 90149.3194039755. The cubic root of 8126899789 is about 2010.5195548904.

The spelling of 8126899789 in words is "eight billion, one hundred twenty-six million, eight hundred ninety-nine thousand, seven hundred eighty-nine".