450689 has 4 divisors (see below), whose sum is σ = 466260. Its totient is φ = 435120.

The previous prime is 450677. The next prime is 450691. The reversal of 450689 is 986054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 986054 = 2 ⋅493027.

It can be written as a sum of positive squares in 2 ways, for example, as 297025 + 153664 = 545^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 450689 - 2¹⁶ = 385153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7742 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (116565).

2⁴⁵⁰⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

450689 is a deficient number, since it is larger than the sum of its proper divisors (15571).

450689 is a wasteful number, since it uses less digits than its factorization.

450689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15570.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 450689 is about 671.3337471035. Note that the first 3 decimals coincide. The cubic root of 450689 is about 76.6700334585.

The spelling of 450689 in words is "four hundred fifty thousand, six hundred eighty-nine".