800647 has 2 divisors, whose sum is σ = 800648. Its totient is φ = 800646.

The previous prime is 800623. The next prime is 800651. The reversal of 800647 is 746008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800647 - 2⁷ = 800519 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (800677) 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, 400323 + 400324.

It is an arithmetic number, because the mean of its divisors is an integer number (400324).

2⁸⁰⁰⁶⁴⁷ is an apocalyptic number.

800647 is a deficient number, since it is larger than the sum of its proper divisors (1).

800647 is an equidigital number, since it uses as much as digits as its factorization.

800647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 800647 is about 894.7888018968. The cubic root of 800647 is about 92.8567958285.

The spelling of 800647 in words is "eight hundred thousand, six hundred forty-seven".