1268043769 has 2 divisors, whose sum is σ = 1268043770. Its totient is φ = 1268043768.

The previous prime is 1268043743. The next prime is 1268043781. The reversal of 1268043769 is 9673408621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1061977744 + 206066025 = 32588^2 + 14355^2 .

It is an emirp because it is prime and its reverse (9673408621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1268043769 - 2²³ = 1259655161 is a prime.

It is a super-2 number, since 2×1268043769² = 3215870000199450722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1268043269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634021884 + 634021885.

It is an arithmetic number, because the mean of its divisors is an integer number (634021885).

Almost surely, 2^1268043769 is an apocalyptic number.

It is an amenable number.

1268043769 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268043769 is an equidigital number, since it uses as much as digits as its factorization.

1268043769 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 46.

The square root of 1268043769 is about 35609.6022022151. The cubic root of 1268043769 is about 1082.3758194306.

The spelling of 1268043769 in words is "one billion, two hundred sixty-eight million, forty-three thousand, seven hundred sixty-nine".