424040009 has 2 divisors, whose sum is σ = 424040010. Its totient is φ = 424040008.

The previous prime is 424039997. The next prime is 424040011. The reversal of 424040009 is 900040424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419430400 + 4609609 = 20480^2 + 2147^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424040009 is a prime.

Together with 424040011, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (424040039) 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, 212020004 + 212020005.

It is an arithmetic number, because the mean of its divisors is an integer number (212020005).

Almost surely, 2^424040009 is an apocalyptic number.

It is an amenable number.

424040009 is a deficient number, since it is larger than the sum of its proper divisors (1).

424040009 is an equidigital number, since it uses as much as digits as its factorization.

424040009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 424040009 is about 20592.2317634588. The cubic root of 424040009 is about 751.2807798552.

The spelling of 424040009 in words is "four hundred twenty-four million, forty thousand, nine".