268806457 has 2 divisors, whose sum is σ = 268806458. Its totient is φ = 268806456.

The previous prime is 268806449. The next prime is 268806491. The reversal of 268806457 is 754608862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215384976 + 53421481 = 14676^2 + 7309^2 .

It is a cyclic number.

It is not a de Polignac number, because 268806457 - 2³ = 268806449 is a prime.

It is a super-2 number, since 2×268806457² = 144513822649785698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (268806557) 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, 134403228 + 134403229.

It is an arithmetic number, because the mean of its divisors is an integer number (134403229).

Almost surely, 2^268806457 is an apocalyptic number.

It is an amenable number.

268806457 is a deficient number, since it is larger than the sum of its proper divisors (1).

268806457 is an equidigital number, since it uses as much as digits as its factorization.

268806457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 268806457 is about 16395.3181426894. The cubic root of 268806457 is about 645.3766259819.

The spelling of 268806457 in words is "two hundred sixty-eight million, eight hundred six thousand, four hundred fifty-seven".