8126438399 has 2 divisors, whose sum is σ = 8126438400. Its totient is φ = 8126438398.

The previous prime is 8126438393. The next prime is 8126438417. The reversal of 8126438399 is 9938346218.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8126438399 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8126438399.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8126438393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4063219199 + 4063219200.

It is an arithmetic number, because the mean of its divisors is an integer number (4063219200).

Almost surely, 2^8126438399 is an apocalyptic number.

8126438399 is a deficient number, since it is larger than the sum of its proper divisors (1).

8126438399 is an equidigital number, since it uses as much as digits as its factorization.

8126438399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2239488, while the sum is 53.

The square root of 8126438399 is about 90146.7603355772. The cubic root of 8126438399 is about 2010.4815063029.

The spelling of 8126438399 in words is "eight billion, one hundred twenty-six million, four hundred thirty-eight thousand, three hundred ninety-nine".