1268134919 has 2 divisors, whose sum is σ = 1268134920. Its totient is φ = 1268134918.

The previous prime is 1268134913. The next prime is 1268134921. The reversal of 1268134919 is 9194318621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268134919 is a prime.

It is a super-2 number, since 2×1268134919² = 3216332345574273122, which contains 22 as substring.

Together with 1268134921, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1268134919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268134913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634067459 + 634067460.

It is an arithmetic number, because the mean of its divisors is an integer number (634067460).

Almost surely, 2^1268134919 is an apocalyptic number.

1268134919 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268134919 is an equidigital number, since it uses as much as digits as its factorization.

1268134919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 44.

The square root of 1268134919 is about 35610.8820306378. The cubic root of 1268134919 is about 1082.4017533913.

The spelling of 1268134919 in words is "one billion, two hundred sixty-eight million, one hundred thirty-four thousand, nine hundred nineteen".