450389 has 4 divisors (see below), whose sum is σ = 452556. Its totient is φ = 448224.

The previous prime is 450383. The next prime is 450391. The reversal of 450389 is 983054.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983054 = 2 ⋅491527.

It can be written as a sum of positive squares in 2 ways, for example, as 195364 + 255025 = 442^2 + 505^2 .

It is a cyclic number.

It is not a de Polignac number, because 450389 - 2¹² = 446293 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734 + ... + 1199.

It is an arithmetic number, because the mean of its divisors is an integer number (113139).

2⁴⁵⁰³⁸⁹ is an apocalyptic number.

It is an amenable number.

450389 is a deficient number, since it is larger than the sum of its proper divisors (2167).

450389 is a wasteful number, since it uses less digits than its factorization.

450389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 450389 is about 671.1102740981. The cubic root of 450389 is about 76.6530179442.

The spelling of 450389 in words is "four hundred fifty thousand, three hundred eighty-nine".