450972217 has 2 divisors, whose sum is σ = 450972218. Its totient is φ = 450972216.

The previous prime is 450972143. The next prime is 450972229. The reversal of 450972217 is 712279054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 432473616 + 18498601 = 20796^2 + 4301^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-450972217 is a prime.

It is not a weakly prime, because it can be changed into another prime (450972517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 225486108 + 225486109.

It is an arithmetic number, because the mean of its divisors is an integer number (225486109).

Almost surely, 2^450972217 is an apocalyptic number.

It is an amenable number.

450972217 is a deficient number, since it is larger than the sum of its proper divisors (1).

450972217 is an equidigital number, since it uses as much as digits as its factorization.

450972217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 37.

The square root of 450972217 is about 21236.1064463333. The cubic root of 450972217 is about 766.8609014062.

The spelling of 450972217 in words is "four hundred fifty million, nine hundred seventy-two thousand, two hundred seventeen".