426666917 has 2 divisors, whose sum is σ = 426666918. Its totient is φ = 426666916.

The previous prime is 426666883. The next prime is 426666953. The reversal of 426666917 is 719666624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 264843076 + 161823841 = 16274^2 + 12721^2 .

It is a cyclic number.

It is not a de Polignac number, because 426666917 - 2⁸ = 426666661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426666967) 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, 213333458 + 213333459.

It is an arithmetic number, because the mean of its divisors is an integer number (213333459).

Almost surely, 2^426666917 is an apocalyptic number.

It is an amenable number.

426666917 is a deficient number, since it is larger than the sum of its proper divisors (1).

426666917 is an equidigital number, since it uses as much as digits as its factorization.

426666917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 47.

The square root of 426666917 is about 20655.9172393772. The cubic root of 426666917 is about 752.8289703377.

The spelling of 426666917 in words is "four hundred twenty-six million, six hundred sixty-six thousand, nine hundred seventeen".