800143217 has 2 divisors, whose sum is σ = 800143218. Its totient is φ = 800143216.

The previous prime is 800143213. The next prime is 800143237. The reversal of 800143217 is 712341008.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 786185521 + 13957696 = 28039^2 + 3736^2 .

It is a cyclic number.

It is not a de Polignac number, because 800143217 - 2² = 800143213 is a prime.

It is a super-2 number, since 2×800143217² = 1280458335422218178, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (800143213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400071608 + 400071609.

It is an arithmetic number, because the mean of its divisors is an integer number (400071609).

Almost surely, 2^800143217 is an apocalyptic number.

It is an amenable number.

800143217 is a deficient number, since it is larger than the sum of its proper divisors (1).

800143217 is an equidigital number, since it uses as much as digits as its factorization.

800143217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 800143217 is about 28286.8028769601. The cubic root of 800143217 is about 928.3731596195.

The spelling of 800143217 in words is "eight hundred million, one hundred forty-three thousand, two hundred seventeen".