800245217 has 2 divisors, whose sum is σ = 800245218. Its totient is φ = 800245216.

The previous prime is 800245163. The next prime is 800245223. The reversal of 800245217 is 712542008.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 578354401 + 221890816 = 24049^2 + 14896^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-800245217 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 800245217.

It is not a weakly prime, because it can be changed into another prime (800845217) 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, 400122608 + 400122609.

It is an arithmetic number, because the mean of its divisors is an integer number (400122609).

Almost surely, 2^800245217 is an apocalyptic number.

It is an amenable number.

800245217 is a deficient number, since it is larger than the sum of its proper divisors (1).

800245217 is an equidigital number, since it uses as much as digits as its factorization.

800245217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 800245217 is about 28288.6057804198. The cubic root of 800245217 is about 928.4126067405.

The spelling of 800245217 in words is "eight hundred million, two hundred forty-five thousand, two hundred seventeen".