268594021 has 2 divisors, whose sum is σ = 268594022. Its totient is φ = 268594020.

The previous prime is 268594003. The next prime is 268594031. The reversal of 268594021 is 120495862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 268500996 + 93025 = 16386^2 + 305^2 .

It is a cyclic number.

It is not a de Polignac number, because 268594021 - 2¹⁵ = 268561253 is a prime.

It is equal to p_14639059 and since 268594021 and 14639059 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268594031) 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 as a sum of consecutive naturals, namely, 134297010 + 134297011.

It is an arithmetic number, because the mean of its divisors is an integer number (134297011).

Almost surely, 2^268594021 is an apocalyptic number.

It is an amenable number.

268594021 is a deficient number, since it is larger than the sum of its proper divisors (1).

268594021 is an equidigital number, since it uses as much as digits as its factorization.

268594021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 268594021 is about 16388.8383053833. The cubic root of 268594021 is about 645.2065688548.

The spelling of 268594021 in words is "two hundred sixty-eight million, five hundred ninety-four thousand, twenty-one".