263789243 has 4 divisors (see below), whose sum is σ = 270918720. Its totient is φ = 256659768.

The previous prime is 263789233. The next prime is 263789297. The reversal of 263789243 is 342987362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-263789243 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 263789194 and 263789203.

It is not an unprimeable number, because it can be changed into a prime (263789213) 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, 3564683 + ... + 3564756.

It is an arithmetic number, because the mean of its divisors is an integer number (67729680).

Almost surely, 2^263789243 is an apocalyptic number.

263789243 is a deficient number, since it is larger than the sum of its proper divisors (7129477).

263789243 is an equidigital number, since it uses as much as digits as its factorization.

263789243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7129476.

The product of its digits is 435456, while the sum is 44.

The square root of 263789243 is about 16241.5899160150. The cubic root of 263789243 is about 641.3361108770.

The spelling of 263789243 in words is "two hundred sixty-three million, seven hundred eighty-nine thousand, two hundred forty-three".