1263968633 has 4 divisors (see below), whose sum is σ = 1264095120. Its totient is φ = 1263842148.

The previous prime is 1263968591. The next prime is 1263968653. The reversal of 1263968633 is 3368693621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1263968633 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1263968653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46835 + ... + 68712.

It is an arithmetic number, because the mean of its divisors is an integer number (316023780).

Almost surely, 2^1263968633 is an apocalyptic number.

It is an amenable number.

1263968633 is a deficient number, since it is larger than the sum of its proper divisors (126487).

1263968633 is a wasteful number, since it uses less digits than its factorization.

1263968633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126486.

The product of its digits is 839808, while the sum is 47.

The square root of 1263968633 is about 35552.3365336232. The cubic root of 1263968633 is about 1081.2150913117.

The spelling of 1263968633 in words is "one billion, two hundred sixty-three million, nine hundred sixty-eight thousand, six hundred thirty-three".