1263331063 has 4 divisors (see below), whose sum is σ = 1263413488. Its totient is φ = 1263248640.

The previous prime is 1263331049. The next prime is 1263331067. The reversal of 1263331063 is 3601333621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 3601333621 = 1097 ⋅3282893.

It is a cyclic number.

It is not a de Polignac number, because 1263331063 - 2²⁵ = 1229776631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263331067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10683 + ... + 51388.

It is an arithmetic number, because the mean of its divisors is an integer number (315853372).

Almost surely, 2^1263331063 is an apocalyptic number.

1263331063 is a deficient number, since it is larger than the sum of its proper divisors (82425).

1263331063 is an equidigital number, since it uses as much as digits as its factorization.

1263331063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82424.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 1263331063 is about 35543.3687626820. The cubic root of 1263331063 is about 1081.0332655324.

Adding to 1263331063 its reverse (3601333621), we get a palindrome (4864664684).

The spelling of 1263331063 in words is "one billion, two hundred sixty-three million, three hundred thirty-one thousand, sixty-three".