266728093 has 2 divisors, whose sum is σ = 266728094. Its totient is φ = 266728092.

The previous prime is 266728087. The next prime is 266728127. The reversal of 266728093 is 390827662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197205849 + 69522244 = 14043^2 + 8338^2 .

It is a cyclic number.

It is not a de Polignac number, because 266728093 - 2¹⁷ = 266597021 is a prime.

It is a super-2 number, since 2×266728093² = 142287751190833298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266726093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133364046 + 133364047.

It is an arithmetic number, because the mean of its divisors is an integer number (133364047).

Almost surely, 2^266728093 is an apocalyptic number.

It is an amenable number.

266728093 is a deficient number, since it is larger than the sum of its proper divisors (1).

266728093 is an equidigital number, since it uses as much as digits as its factorization.

266728093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 266728093 is about 16331.8122999256. The cubic root of 266728093 is about 643.7090080034.

The spelling of 266728093 in words is "two hundred sixty-six million, seven hundred twenty-eight thousand, ninety-three".