1268499443 has 2 divisors, whose sum is σ = 1268499444. Its totient is φ = 1268499442.

The previous prime is 1268499437. The next prime is 1268499461. The reversal of 1268499443 is 3449948621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1268499443 - 2²⁰ = 1267450867 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1268499391 and 1268499400.

It is not a weakly prime, because it can be changed into another prime (1268499143) 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, 634249721 + 634249722.

It is an arithmetic number, because the mean of its divisors is an integer number (634249722).

Almost surely, 2^1268499443 is an apocalyptic number.

1268499443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268499443 is an equidigital number, since it uses as much as digits as its factorization.

1268499443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1492992, while the sum is 50.

The square root of 1268499443 is about 35615.9998174978. Note that the first 3 decimals coincide. The cubic root of 1268499443 is about 1082.5054551903.

The spelling of 1268499443 in words is "one billion, two hundred sixty-eight million, four hundred ninety-nine thousand, four hundred forty-three".