266234393 has 2 divisors, whose sum is σ = 266234394. Its totient is φ = 266234392.

The previous prime is 266234389. The next prime is 266234447. The reversal of 266234393 is 393432662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265136089 + 1098304 = 16283^2 + 1048^2 .

It is a cyclic number.

It is not a de Polignac number, because 266234393 - 2² = 266234389 is a prime.

It is not a weakly prime, because it can be changed into another prime (266234693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133117196 + 133117197.

It is an arithmetic number, because the mean of its divisors is an integer number (133117197).

Almost surely, 2^266234393 is an apocalyptic number.

It is an amenable number.

266234393 is a deficient number, since it is larger than the sum of its proper divisors (1).

266234393 is an equidigital number, since it uses as much as digits as its factorization.

266234393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 38.

The square root of 266234393 is about 16316.6906264720. The cubic root of 266234393 is about 643.3116052750.

The spelling of 266234393 in words is "two hundred sixty-six million, two hundred thirty-four thousand, three hundred ninety-three".