450391289 has 2 divisors, whose sum is σ = 450391290. Its totient is φ = 450391288.

The previous prime is 450391261. The next prime is 450391301. The reversal of 450391289 is 982193054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 404693689 + 45697600 = 20117^2 + 6760^2 .

It is a cyclic number.

It is not a de Polignac number, because 450391289 - 2¹² = 450387193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (450391259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225195644 + 225195645.

It is an arithmetic number, because the mean of its divisors is an integer number (225195645).

Almost surely, 2^450391289 is an apocalyptic number.

It is an amenable number.

450391289 is a deficient number, since it is larger than the sum of its proper divisors (1).

450391289 is an equidigital number, since it uses as much as digits as its factorization.

450391289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 450391289 is about 21222.4242017730. The cubic root of 450391289 is about 766.5314780115.

The spelling of 450391289 in words is "four hundred fifty million, three hundred ninety-one thousand, two hundred eighty-nine".