268364021 has 2 divisors, whose sum is σ = 268364022. Its totient is φ = 268364020.

The previous prime is 268363967. The next prime is 268364029. The reversal of 268364021 is 120463862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 240591121 + 27772900 = 15511^2 + 5270^2 .

It is a cyclic number.

It is not a de Polignac number, because 268364021 - 2¹⁸ = 268101877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268364029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134182010 + 134182011.

It is an arithmetic number, because the mean of its divisors is an integer number (134182011).

Almost surely, 2^268364021 is an apocalyptic number.

It is an amenable number.

268364021 is a deficient number, since it is larger than the sum of its proper divisors (1).

268364021 is an equidigital number, since it uses as much as digits as its factorization.

268364021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 268364021 is about 16381.8198317525. The cubic root of 268364021 is about 645.0223504464.

The spelling of 268364021 in words is "two hundred sixty-eight million, three hundred sixty-four thousand, twenty-one".