1263263269 has 2 divisors, whose sum is σ = 1263263270. Its totient is φ = 1263263268.

The previous prime is 1263263231. The next prime is 1263263333. The reversal of 1263263269 is 9623623621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1124730369 + 138532900 = 33537^2 + 11770^2 .

It is an emirp because it is prime and its reverse (9623623621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1263263269 - 2¹¹ = 1263261221 is a prime.

It is a super-2 number, since 2×1263263269² = 3191668173609132722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263263369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631631634 + 631631635.

It is an arithmetic number, because the mean of its divisors is an integer number (631631635).

Almost surely, 2^1263263269 is an apocalyptic number.

It is an amenable number.

1263263269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263263269 is an equidigital number, since it uses as much as digits as its factorization.

1263263269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The square root of 1263263269 is about 35542.4150698852. The cubic root of 1263263269 is about 1081.0139280622.

The spelling of 1263263269 in words is "one billion, two hundred sixty-three million, two hundred sixty-three thousand, two hundred sixty-nine".