268643623 has 4 divisors (see below), whose sum is σ = 272427408. Its totient is φ = 264859840.

The previous prime is 268643621. The next prime is 268643629. The reversal of 268643623 is 326346862.

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 268643623 - 2¹ = 268643621 is a prime.

It is a super-2 number, since 2×268643623² = 144338792357132258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (268643621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1891786 + ... + 1891927.

It is an arithmetic number, because the mean of its divisors is an integer number (68106852).

Almost surely, 2^268643623 is an apocalyptic number.

268643623 is a deficient number, since it is larger than the sum of its proper divisors (3783785).

268643623 is an equidigital number, since it uses as much as digits as its factorization.

268643623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3783784.

The product of its digits is 248832, while the sum is 40.

The square root of 268643623 is about 16390.3515215507. The cubic root of 268643623 is about 645.2462837700.

The spelling of 268643623 in words is "two hundred sixty-eight million, six hundred forty-three thousand, six hundred twenty-three".