806403839 has 2 divisors, whose sum is σ = 806403840. Its totient is φ = 806403838.

The previous prime is 806403827. The next prime is 806403853. The reversal of 806403839 is 938304608.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 806403839 - 2²⁴ = 789626623 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 806403796 and 806403805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806403889) 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, 403201919 + 403201920.

It is an arithmetic number, because the mean of its divisors is an integer number (403201920).

Almost surely, 2^806403839 is an apocalyptic number.

806403839 is a deficient number, since it is larger than the sum of its proper divisors (1).

806403839 is an equidigital number, since it uses as much as digits as its factorization.

806403839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 806403839 is about 28397.2505535307. The cubic root of 806403839 is about 930.7881856324.

The spelling of 806403839 in words is "eight hundred six million, four hundred three thousand, eight hundred thirty-nine".