450505993 has 8 divisors (see below), whose sum is σ = 515438912. Its totient is φ = 385716816.

The previous prime is 450505973. The next prime is 450505997. The reversal of 450505993 is 399505054.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 450505993 - 2⁵ = 450505961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (450505997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29130 + ... + 41827.

It is an arithmetic number, because the mean of its divisors is an integer number (64429864).

Almost surely, 2^450505993 is an apocalyptic number.

It is an amenable number.

450505993 is a deficient number, since it is larger than the sum of its proper divisors (64932919).

450505993 is an equidigital number, since it uses as much as digits as its factorization.

450505993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71871.

The product of its (nonzero) digits is 121500, while the sum is 40.

The square root of 450505993 is about 21225.1264542758. The cubic root of 450505993 is about 766.5965449624.

The spelling of 450505993 in words is "four hundred fifty million, five hundred five thousand, nine hundred ninety-three".