450627989 has 4 divisors (see below), whose sum is σ = 515003424. Its totient is φ = 386252556.

The previous prime is 450627979. The next prime is 450628021. The reversal of 450627989 is 989726054.

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 an emirpimes, since its reverse is a distinct semiprime: 989726054 = 2 ⋅494863027.

It is a cyclic number.

It is not a de Polignac number, because 450627989 - 2⁴ = 450627973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (450627979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32187707 + ... + 32187720.

It is an arithmetic number, because the mean of its divisors is an integer number (128750856).

Almost surely, 2^450627989 is an apocalyptic number.

It is an amenable number.

450627989 is a deficient number, since it is larger than the sum of its proper divisors (64375435).

450627989 is an equidigital number, since it uses as much as digits as its factorization.

450627989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64375434.

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 450627989 is about 21228.0001177690. Note that the first 3 decimals coincide. The cubic root of 450627989 is about 766.6657362518.

The spelling of 450627989 in words is "four hundred fifty million, six hundred twenty-seven thousand, nine hundred eighty-nine".