1263936799 has 2 divisors, whose sum is σ = 1263936800. Its totient is φ = 1263936798.

The previous prime is 1263936787. The next prime is 1263936809. The reversal of 1263936799 is 9976393621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263936799 - 2⁷ = 1263936671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263936749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631968399 + 631968400.

It is an arithmetic number, because the mean of its divisors is an integer number (631968400).

Almost surely, 2^1263936799 is an apocalyptic number.

1263936799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263936799 is an equidigital number, since it uses as much as digits as its factorization.

1263936799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3306744, while the sum is 55.

The square root of 1263936799 is about 35551.8888246462. Note that the first 4 decimals coincide. The cubic root of 1263936799 is about 1081.2060141640.

It can be divided in two parts, 1 and 263936799, that added together give a triangular number (263936800 = T₂₂₉₇₅).

The spelling of 1263936799 in words is "one billion, two hundred sixty-three million, nine hundred thirty-six thousand, seven hundred ninety-nine".