1263888811 has 2 divisors, whose sum is σ = 1263888812. Its totient is φ = 1263888810.

The previous prime is 1263888793. The next prime is 1263888823. The reversal of 1263888811 is 1188883621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263888811 - 2⁹ = 1263888299 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263888881) 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, 631944405 + 631944406.

It is an arithmetic number, because the mean of its divisors is an integer number (631944406).

Almost surely, 2^1263888811 is an apocalyptic number.

1263888811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263888811 is an equidigital number, since it uses as much as digits as its factorization.

1263888811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 147456, while the sum is 46.

The square root of 1263888811 is about 35551.2139173897. The cubic root of 1263888811 is about 1081.1923305761.

The spelling of 1263888811 in words is "one billion, two hundred sixty-three million, eight hundred eighty-eight thousand, eight hundred eleven".