268884821 has 4 divisors (see below), whose sum is σ = 269066412. Its totient is φ = 268703232.

The previous prime is 268884779. The next prime is 268884823. The reversal of 268884821 is 128488862.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 141871921 + 127012900 = 11911^2 + 11270^2 .

It is a cyclic number.

It is not a de Polignac number, because 268884821 - 2¹⁴ = 268868437 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 (268884823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 88556 + ... + 91541.

It is an arithmetic number, because the mean of its divisors is an integer number (67266603).

Almost surely, 2^268884821 is an apocalyptic number.

It is an amenable number.

268884821 is a deficient number, since it is larger than the sum of its proper divisors (181591).

268884821 is a wasteful number, since it uses less digits than its factorization.

268884821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181590.

The product of its digits is 393216, while the sum is 47.

The square root of 268884821 is about 16397.7077971282. The cubic root of 268884821 is about 645.4393345204.

The spelling of 268884821 in words is "two hundred sixty-eight million, eight hundred eighty-four thousand, eight hundred twenty-one".