266421293 has 2 divisors, whose sum is σ = 266421294. Its totient is φ = 266421292.

The previous prime is 266421277. The next prime is 266421313. The reversal of 266421293 is 392124662.

266421293 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217798564 + 48622729 = 14758^2 + 6973^2 .

It is a cyclic number.

It is not a de Polignac number, because 266421293 - 2⁴ = 266421277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (266421193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 133210646 + 133210647.

It is an arithmetic number, because the mean of its divisors is an integer number (133210647).

Almost surely, 2^266421293 is an apocalyptic number.

It is an amenable number.

266421293 is a deficient number, since it is larger than the sum of its proper divisors (1).

266421293 is an equidigital number, since it uses as much as digits as its factorization.

266421293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 266421293 is about 16322.4168859884. The cubic root of 266421293 is about 643.4621077616.

The spelling of 266421293 in words is "two hundred sixty-six million, four hundred twenty-one thousand, two hundred ninety-three".