424656809 has 4 divisors (see below), whose sum is σ = 424811220. Its totient is φ = 424502400.

The previous prime is 424656779. The next prime is 424656811. The reversal of 424656809 is 908656424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 253701184 + 170955625 = 15928^2 + 13075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424656809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 424656809.

It is not an unprimeable number, because it can be changed into a prime (424656899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73004 + ... + 78605.

It is an arithmetic number, because the mean of its divisors is an integer number (106202805).

Almost surely, 2^424656809 is an apocalyptic number.

It is an amenable number.

424656809 is a deficient number, since it is larger than the sum of its proper divisors (154411).

424656809 is a wasteful number, since it uses less digits than its factorization.

424656809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154410.

The product of its (nonzero) digits is 414720, while the sum is 44.

The square root of 424656809 is about 20607.2028426956. The cubic root of 424656809 is about 751.6448693101.

The spelling of 424656809 in words is "four hundred twenty-four million, six hundred fifty-six thousand, eight hundred nine".