806490871 has 2 divisors, whose sum is σ = 806490872. Its totient is φ = 806490870.

The previous prime is 806490847. The next prime is 806490953. The reversal of 806490871 is 178094608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 806490871 - 2⁷ = 806490743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806490071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403245435 + 403245436.

It is an arithmetic number, because the mean of its divisors is an integer number (403245436).

Almost surely, 2^806490871 is an apocalyptic number.

806490871 is a deficient number, since it is larger than the sum of its proper divisors (1).

806490871 is an equidigital number, since it uses as much as digits as its factorization.

806490871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 806490871 is about 28398.7829140617. The cubic root of 806490871 is about 930.8216698658.

The spelling of 806490871 in words is "eight hundred six million, four hundred ninety thousand, eight hundred seventy-one".