426020009 has 2 divisors, whose sum is σ = 426020010. Its totient is φ = 426020008.

The previous prime is 426020003. The next prime is 426020027. The reversal of 426020009 is 900020624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273571600 + 152448409 = 16540^2 + 12347^2 .

It is a cyclic number.

It is not a de Polignac number, because 426020009 - 2²⁰ = 424971433 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426020003) 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, 213010004 + 213010005.

It is an arithmetic number, because the mean of its divisors is an integer number (213010005).

Almost surely, 2^426020009 is an apocalyptic number.

It is an amenable number.

426020009 is a deficient number, since it is larger than the sum of its proper divisors (1).

426020009 is an equidigital number, since it uses as much as digits as its factorization.

426020009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 426020009 is about 20640.2521544675. The cubic root of 426020009 is about 752.4483006979.

The spelling of 426020009 in words is "four hundred twenty-six million, twenty thousand, nine".