426398857 has 2 divisors, whose sum is σ = 426398858. Its totient is φ = 426398856.

The previous prime is 426398851. The next prime is 426398867. The reversal of 426398857 is 758893624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 423495241 + 2903616 = 20579^2 + 1704^2 .

It is a cyclic number.

It is not a de Polignac number, because 426398857 - 2¹¹ = 426396809 is a prime.

It is not a weakly prime, because it can be changed into another prime (426398851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213199428 + 213199429.

It is an arithmetic number, because the mean of its divisors is an integer number (213199429).

Almost surely, 2^426398857 is an apocalyptic number.

It is an amenable number.

426398857 is a deficient number, since it is larger than the sum of its proper divisors (1).

426398857 is an equidigital number, since it uses as much as digits as its factorization.

426398857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 52.

The square root of 426398857 is about 20649.4275223310. The cubic root of 426398857 is about 752.6712785470.

The spelling of 426398857 in words is "four hundred twenty-six million, three hundred ninety-eight thousand, eight hundred fifty-seven".