8128443469 has 2 divisors, whose sum is σ = 8128443470. Its totient is φ = 8128443468.

The previous prime is 8128443419. The next prime is 8128443541. The reversal of 8128443469 is 9643448218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6466250569 + 1662192900 = 80413^2 + 40770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8128443469 is a prime.

It is a super-2 number, since 2×8128443469² (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 (8128443419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4064221734 + 4064221735.

It is an arithmetic number, because the mean of its divisors is an integer number (4064221735).

Almost surely, 2^8128443469 is an apocalyptic number.

It is an amenable number.

8128443469 is a deficient number, since it is larger than the sum of its proper divisors (1).

8128443469 is an equidigital number, since it uses as much as digits as its factorization.

8128443469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1327104, while the sum is 49.

The square root of 8128443469 is about 90157.8807925297. The cubic root of 8128443469 is about 2010.6468441980.

The spelling of 8128443469 in words is "eight billion, one hundred twenty-eight million, four hundred forty-three thousand, four hundred sixty-nine".