445654217 has 2 divisors, whose sum is σ = 445654218. Its totient is φ = 445654216.

The previous prime is 445654213. The next prime is 445654219. The reversal of 445654217 is 712456544.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277588921 + 168065296 = 16661^2 + 12964^2 .

It is a cyclic number.

It is not a de Polignac number, because 445654217 - 2² = 445654213 is a prime.

It is a super-2 number, since 2×445654217² = 397215362259766178, which contains 22 as substring.

Together with 445654219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (445654211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222827108 + 222827109.

It is an arithmetic number, because the mean of its divisors is an integer number (222827109).

Almost surely, 2^445654217 is an apocalyptic number.

It is an amenable number.

445654217 is a deficient number, since it is larger than the sum of its proper divisors (1).

445654217 is an equidigital number, since it uses as much as digits as its factorization.

445654217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 134400, while the sum is 38.

The square root of 445654217 is about 21110.5238447557. The cubic root of 445654217 is about 763.8346229997.

The spelling of 445654217 in words is "four hundred forty-five million, six hundred fifty-four thousand, two hundred seventeen".