1268513263 has 2 divisors, whose sum is σ = 1268513264. Its totient is φ = 1268513262.

The previous prime is 1268513261. The next prime is 1268513299. The reversal of 1268513263 is 3623158621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1268513263 - 2¹ = 1268513261 is a prime.

Together with 1268513261, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1268513261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634256631 + 634256632.

It is an arithmetic number, because the mean of its divisors is an integer number (634256632).

Almost surely, 2^1268513263 is an apocalyptic number.

1268513263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268513263 is an equidigital number, since it uses as much as digits as its factorization.

1268513263 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 1268513263 is about 35616.1938308966. The cubic root of 1268513263 is about 1082.5093863893.

The spelling of 1268513263 in words is "one billion, two hundred sixty-eight million, five hundred thirteen thousand, two hundred sixty-three".