264426191 has 2 divisors, whose sum is σ = 264426192. Its totient is φ = 264426190.

The previous prime is 264426167. The next prime is 264426199. The reversal of 264426191 is 191624462.

264426191 is nontrivially palindromic in base 16.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-264426191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264426199) 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, 132213095 + 132213096.

It is an arithmetic number, because the mean of its divisors is an integer number (132213096).

Almost surely, 2^264426191 is an apocalyptic number.

264426191 is a deficient number, since it is larger than the sum of its proper divisors (1).

264426191 is an equidigital number, since it uses as much as digits as its factorization.

264426191 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 264426191 is about 16261.1866418168. The cubic root of 264426191 is about 641.8518880448.

The spelling of 264426191 in words is "two hundred sixty-four million, four hundred twenty-six thousand, one hundred ninety-one".