268649443 has 4 divisors (see below), whose sum is σ = 268689640. Its totient is φ = 268609248.

The previous prime is 268649411. The next prime is 268649449. The reversal of 268649443 is 344946862.

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 268649443 - 2⁵ = 268649411 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 268649393 and 268649402.

It is not an unprimeable number, because it can be changed into a prime (268649449) 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, 7398 + ... + 24331.

It is an arithmetic number, because the mean of its divisors is an integer number (67172410).

Almost surely, 2^268649443 is an apocalyptic number.

268649443 is a deficient number, since it is larger than the sum of its proper divisors (40197).

268649443 is an equidigital number, since it uses as much as digits as its factorization.

268649443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40196.

The product of its digits is 995328, while the sum is 46.

The square root of 268649443 is about 16390.5290640662. The cubic root of 268649443 is about 645.2509433586.

The spelling of 268649443 in words is "two hundred sixty-eight million, six hundred forty-nine thousand, four hundred forty-three".