426571909 has 2 divisors, whose sum is σ = 426571910. Its totient is φ = 426571908.

The previous prime is 426571897. The next prime is 426571979. The reversal of 426571909 is 909175624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 348867684 + 77704225 = 18678^2 + 8815^2 .

It is a cyclic number.

It is not a de Polignac number, because 426571909 - 2⁵ = 426571877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426571979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213285954 + 213285955.

It is an arithmetic number, because the mean of its divisors is an integer number (213285955).

Almost surely, 2^426571909 is an apocalyptic number.

It is an amenable number.

426571909 is a deficient number, since it is larger than the sum of its proper divisors (1).

426571909 is an equidigital number, since it uses as much as digits as its factorization.

426571909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 426571909 is about 20653.6173345010. The cubic root of 426571909 is about 752.7730874921.

The spelling of 426571909 in words is "four hundred twenty-six million, five hundred seventy-one thousand, nine hundred nine".