426566489 has 2 divisors, whose sum is σ = 426566490. Its totient is φ = 426566488.

The previous prime is 426566449. The next prime is 426566507. The reversal of 426566489 is 984665624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426216025 + 350464 = 20645^2 + 592^2 .

It is a cyclic number.

It is not a de Polignac number, because 426566489 - 2⁸ = 426566233 is a prime.

It is a super-3 number, since 3×426566489³ (a number of 27 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426566429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213283244 + 213283245.

It is an arithmetic number, because the mean of its divisors is an integer number (213283245).

Almost surely, 2^426566489 is an apocalyptic number.

It is an amenable number.

426566489 is a deficient number, since it is larger than the sum of its proper divisors (1).

426566489 is an equidigital number, since it uses as much as digits as its factorization.

426566489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2488320, while the sum is 50.

The square root of 426566489 is about 20653.4861222022. The cubic root of 426566489 is about 752.7698992470.

The spelling of 426566489 in words is "four hundred twenty-six million, five hundred sixty-six thousand, four hundred eighty-nine".