263986423 has 4 divisors (see below), whose sum is σ = 264049360. Its totient is φ = 263923488.

The previous prime is 263986367. The next prime is 263986493. The reversal of 263986423 is 324689362.

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-263986423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 263986423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (263986493) 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, 24690 + ... + 33727.

It is an arithmetic number, because the mean of its divisors is an integer number (66012340).

Almost surely, 2^263986423 is an apocalyptic number.

263986423 is a deficient number, since it is larger than the sum of its proper divisors (62937).

263986423 is an equidigital number, since it uses as much as digits as its factorization.

263986423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62936.

The product of its digits is 373248, while the sum is 43.

The square root of 263986423 is about 16247.6590006068. The cubic root of 263986423 is about 641.4958686658.

The spelling of 263986423 in words is "two hundred sixty-three million, nine hundred eighty-six thousand, four hundred twenty-three".