268443953 has 4 divisors (see below), whose sum is σ = 269488740. Its totient is φ = 267399168.

The previous prime is 268443947. The next prime is 268444003. The reversal of 268443953 is 359344862.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 359344862 = 2 ⋅179672431.

It can be written as a sum of positive squares in 2 ways, for example, as 235070224 + 33373729 = 15332^2 + 5777^2 .

It is a cyclic number.

It is not a de Polignac number, because 268443953 - 2⁸ = 268443697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268043953) 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, 522008 + ... + 522521.

It is an arithmetic number, because the mean of its divisors is an integer number (67372185).

Almost surely, 2^268443953 is an apocalyptic number.

It is an amenable number.

268443953 is a deficient number, since it is larger than the sum of its proper divisors (1044787).

268443953 is a wasteful number, since it uses less digits than its factorization.

268443953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044786.

The product of its digits is 622080, while the sum is 44.

The square root of 268443953 is about 16384.2593058093. The cubic root of 268443953 is about 645.0863838792.

Subtracting 268443953 from its reverse (359344862), we obtain a palindrome (90900909).

The spelling of 268443953 in words is "two hundred sixty-eight million, four hundred forty-three thousand, nine hundred fifty-three".