200920217 has 2 divisors, whose sum is σ = 200920218. Its totient is φ = 200920216.

The previous prime is 200920201. The next prime is 200920219. The reversal of 200920217 is 712029002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134073241 + 66846976 = 11579^2 + 8176^2 .

It is a cyclic number.

It is not a de Polignac number, because 200920217 - 2⁴ = 200920201 is a prime.

Together with 200920219, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 200920192 and 200920201.

It is not a weakly prime, because it can be changed into another prime (200920219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100460108 + 100460109.

It is an arithmetic number, because the mean of its divisors is an integer number (100460109).

Almost surely, 2^200920217 is an apocalyptic number.

It is an amenable number.

200920217 is a deficient number, since it is larger than the sum of its proper divisors (1).

200920217 is an equidigital number, since it uses as much as digits as its factorization.

200920217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 200920217 is about 14174.6328700252. The cubic root of 200920217 is about 585.6990858382.

Adding to 200920217 its reverse (712029002), we get a palindrome (912949219).

The spelling of 200920217 in words is "two hundred million, nine hundred twenty thousand, two hundred seventeen".