451244009 has 2 divisors, whose sum is σ = 451244010. Its totient is φ = 451244008.

The previous prime is 451243999. The next prime is 451244047. The reversal of 451244009 is 900442154.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395413225 + 55830784 = 19885^2 + 7472^2 .

It is a cyclic number.

It is not a de Polignac number, because 451244009 - 2⁸ = 451243753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (451244069) 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 as a sum of consecutive naturals, namely, 225622004 + 225622005.

It is an arithmetic number, because the mean of its divisors is an integer number (225622005).

Almost surely, 2^451244009 is an apocalyptic number.

It is an amenable number.

451244009 is a deficient number, since it is larger than the sum of its proper divisors (1).

451244009 is an equidigital number, since it uses as much as digits as its factorization.

451244009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 451244009 is about 21242.5047722720. The cubic root of 451244009 is about 767.0149277465.

The spelling of 451244009 in words is "four hundred fifty-one million, two hundred forty-four thousand, nine".