266038193 has 2 divisors, whose sum is σ = 266038194. Its totient is φ = 266038192.

The previous prime is 266038169. The next prime is 266038211. The reversal of 266038193 is 391830662.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264810529 + 1227664 = 16273^2 + 1108^2 .

It is a cyclic number.

It is not a de Polignac number, because 266038193 - 2¹⁰ = 266037169 is a prime.

It is not a weakly prime, because it can be changed into another prime (266038393) 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, 133019096 + 133019097.

It is an arithmetic number, because the mean of its divisors is an integer number (133019097).

Almost surely, 2^266038193 is an apocalyptic number.

It is an amenable number.

266038193 is a deficient number, since it is larger than the sum of its proper divisors (1).

266038193 is an equidigital number, since it uses as much as digits as its factorization.

266038193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 266038193 is about 16310.6772698132. The cubic root of 266038193 is about 643.1535381004.

The spelling of 266038193 in words is "two hundred sixty-six million, thirty-eight thousand, one hundred ninety-three".