424651009 has 2 divisors, whose sum is σ = 424651010. Its totient is φ = 424651008.

The previous prime is 424650997. The next prime is 424651027. The reversal of 424651009 is 900156424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 352876225 + 71774784 = 18785^2 + 8472^2 .

It is a cyclic number.

It is not a de Polignac number, because 424651009 - 2²⁷ = 290433281 is a prime.

It is not a weakly prime, because it can be changed into another prime (424651049) 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, 212325504 + 212325505.

It is an arithmetic number, because the mean of its divisors is an integer number (212325505).

Almost surely, 2^424651009 is an apocalyptic number.

It is an amenable number.

424651009 is a deficient number, since it is larger than the sum of its proper divisors (1).

424651009 is an equidigital number, since it uses as much as digits as its factorization.

424651009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 424651009 is about 20607.0621147217. The cubic root of 424651009 is about 751.6414472840.

It can be divided in two parts, 4246 and 51009, that added together give a palindrome (55255).

The spelling of 424651009 in words is "four hundred twenty-four million, six hundred fifty-one thousand, nine".