266394109 has 4 divisors (see below), whose sum is σ = 266428000. Its totient is φ = 266360220.

The previous prime is 266394103. The next prime is 266394127. The reversal of 266394109 is 901493662.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-266394109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266394103) 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 in 3 ways as a sum of consecutive naturals, for example, 1642 + ... + 23140.

It is an arithmetic number, because the mean of its divisors is an integer number (66607000).

Almost surely, 2^266394109 is an apocalyptic number.

It is an amenable number.

266394109 is a deficient number, since it is larger than the sum of its proper divisors (33891).

266394109 is a wasteful number, since it uses less digits than its factorization.

266394109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33890.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 266394109 is about 16321.5841449291. The cubic root of 266394109 is about 643.4402220373.

The spelling of 266394109 in words is "two hundred sixty-six million, three hundred ninety-four thousand, one hundred nine".