450783989 has 4 divisors (see below), whose sum is σ = 465325440. Its totient is φ = 436242540.

The previous prime is 450783959. The next prime is 450784031. The reversal of 450783989 is 989387054.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 989387054 = 2 ⋅494693527.

It is not a de Polignac number, because 450783989 - 2²⁰ = 449735413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 450783989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450783959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7270679 + ... + 7270740.

It is an arithmetic number, because the mean of its divisors is an integer number (116331360).

Almost surely, 2^450783989 is an apocalyptic number.

It is an amenable number.

450783989 is a deficient number, since it is larger than the sum of its proper divisors (14541451).

450783989 is a wasteful number, since it uses less digits than its factorization.

450783989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14541450.

The product of its (nonzero) digits is 2177280, while the sum is 53.

The square root of 450783989 is about 21231.6741921121. The cubic root of 450783989 is about 766.7541950687.

The spelling of 450783989 in words is "four hundred fifty million, seven hundred eighty-three thousand, nine hundred eighty-nine".