424065809 has 2 divisors, whose sum is σ = 424065810. Its totient is φ = 424065808.

The previous prime is 424065797. The next prime is 424065893. The reversal of 424065809 is 908560424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419430400 + 4635409 = 20480^2 + 2153^2 .

It is a cyclic number.

It is not a de Polignac number, because 424065809 - 2¹² = 424061713 is a prime.

It is not a weakly prime, because it can be changed into another prime (424065899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212032904 + 212032905.

It is an arithmetic number, because the mean of its divisors is an integer number (212032905).

Almost surely, 2^424065809 is an apocalyptic number.

It is an amenable number.

424065809 is a deficient number, since it is larger than the sum of its proper divisors (1).

424065809 is an equidigital number, since it uses as much as digits as its factorization.

424065809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 424065809 is about 20592.8582037560. The cubic root of 424065809 is about 751.2960163507.

The spelling of 424065809 in words is "four hundred twenty-four million, sixty-five thousand, eight hundred nine".