263798963 has 4 divisors (see below), whose sum is σ = 265546128. Its totient is φ = 262051800.

The previous prime is 263798947. The next prime is 263798981. The reversal of 263798963 is 369897362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 263798963 - 2⁴ = 263798947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (263798903) 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, 873356 + ... + 873657.

It is an arithmetic number, because the mean of its divisors is an integer number (66386532).

Almost surely, 2^263798963 is an apocalyptic number.

263798963 is a deficient number, since it is larger than the sum of its proper divisors (1747165).

263798963 is a wasteful number, since it uses less digits than its factorization.

263798963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1747164.

The product of its digits is 2939328, while the sum is 53.

The square root of 263798963 is about 16241.8891450471. The cubic root of 263798963 is about 641.3439880120.

The spelling of 263798963 in words is "two hundred sixty-three million, seven hundred ninety-eight thousand, nine hundred sixty-three".