445843217 has 2 divisors, whose sum is σ = 445843218. Its totient is φ = 445843216.

The previous prime is 445843199. The next prime is 445843253. The reversal of 445843217 is 712348544.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 354907921 + 90935296 = 18839^2 + 9536^2 .

It is a cyclic number.

It is not a de Polignac number, because 445843217 - 2²⁰ = 444794641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445803217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222921608 + 222921609.

It is an arithmetic number, because the mean of its divisors is an integer number (222921609).

Almost surely, 2^445843217 is an apocalyptic number.

It is an amenable number.

445843217 is a deficient number, since it is larger than the sum of its proper divisors (1).

445843217 is an equidigital number, since it uses as much as digits as its factorization.

445843217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 38.

The square root of 445843217 is about 21114.9998105612. Note that the first 3 decimals coincide. The cubic root of 445843217 is about 763.9425873773.

The spelling of 445843217 in words is "four hundred forty-five million, eight hundred forty-three thousand, two hundred seventeen".