263938463 has 4 divisors (see below), whose sum is σ = 268918488. Its totient is φ = 258958440.

The previous prime is 263938459. The next prime is 263938513. The reversal of 263938463 is 364839362.

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 263938463 - 2² = 263938459 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 (263938663) 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, 2489933 + ... + 2490038.

It is an arithmetic number, because the mean of its divisors is an integer number (67229622).

Almost surely, 2^263938463 is an apocalyptic number.

263938463 is a deficient number, since it is larger than the sum of its proper divisors (4980025).

263938463 is an equidigital number, since it uses as much as digits as its factorization.

263938463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4980024.

The product of its digits is 559872, while the sum is 44.

The square root of 263938463 is about 16246.1830286378. The cubic root of 263938463 is about 641.4570181764.

The spelling of 263938463 in words is "two hundred sixty-three million, nine hundred thirty-eight thousand, four hundred sixty-three".