450642389 has 2 divisors, whose sum is σ = 450642390. Its totient is φ = 450642388.

The previous prime is 450642383. The next prime is 450642419. The reversal of 450642389 is 983246054.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 427042225 + 23600164 = 20665^2 + 4858^2 .

It is a cyclic number.

It is not a de Polignac number, because 450642389 - 2⁴ = 450642373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (450642383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225321194 + 225321195.

It is an arithmetic number, because the mean of its divisors is an integer number (225321195).

Almost surely, 2^450642389 is an apocalyptic number.

It is an amenable number.

450642389 is a deficient number, since it is larger than the sum of its proper divisors (1).

450642389 is an equidigital number, since it uses as much as digits as its factorization.

450642389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 41.

The square root of 450642389 is about 21228.3392897325. The cubic root of 450642389 is about 766.6739025362.

The spelling of 450642389 in words is "four hundred fifty million, six hundred forty-two thousand, three hundred eighty-nine".