450621889 has 4 divisors (see below), whose sum is σ = 450674224. Its totient is φ = 450569556.

The previous prime is 450621887. The next prime is 450621893. The reversal of 450621889 is 988126054.

It is a happy number.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 450621889 - 2¹ = 450621887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450621883) 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 in 3 ways as a sum of consecutive naturals, for example, 9867 + ... + 31600.

It is an arithmetic number, because the mean of its divisors is an integer number (112668556).

Almost surely, 2^450621889 is an apocalyptic number.

It is an amenable number.

450621889 is a deficient number, since it is larger than the sum of its proper divisors (52335).

450621889 is a wasteful number, since it uses less digits than its factorization.

450621889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52334.

The product of its (nonzero) digits is 138240, while the sum is 43.

The square root of 450621889 is about 21227.8564391226. The cubic root of 450621889 is about 766.6622768705.

The spelling of 450621889 in words is "four hundred fifty million, six hundred twenty-one thousand, eight hundred eighty-nine".