450685889 has 2 divisors, whose sum is σ = 450685890. Its totient is φ = 450685888.

The previous prime is 450685841. The next prime is 450685901. The reversal of 450685889 is 988586054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 308599489 + 142086400 = 17567^2 + 11920^2 .

It is a cyclic number.

It is not a de Polignac number, because 450685889 - 2¹⁶ = 450620353 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 450685889.

It is not a weakly prime, because it can be changed into another prime (450684889) 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, 225342944 + 225342945.

It is an arithmetic number, because the mean of its divisors is an integer number (225342945).

Almost surely, 2^450685889 is an apocalyptic number.

It is an amenable number.

450685889 is a deficient number, since it is larger than the sum of its proper divisors (1).

450685889 is an equidigital number, since it uses as much as digits as its factorization.

450685889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2764800, while the sum is 53.

The square root of 450685889 is about 21229.3638387965. The cubic root of 450685889 is about 766.6985704640.

The spelling of 450685889 in words is "four hundred fifty million, six hundred eighty-five thousand, eight hundred eighty-nine".