812803939 has 2 divisors, whose sum is σ = 812803940. Its totient is φ = 812803938.

The previous prime is 812803933. The next prime is 812803951. The reversal of 812803939 is 939308218.

It is a happy number.

812803939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 812803939 - 2⁹ = 812803427 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 812803895 and 812803904.

It is not a weakly prime, because it can be changed into another prime (812803933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406401969 + 406401970.

It is an arithmetic number, because the mean of its divisors is an integer number (406401970).

Almost surely, 2^812803939 is an apocalyptic number.

812803939 is a deficient number, since it is larger than the sum of its proper divisors (1).

812803939 is an equidigital number, since it uses as much as digits as its factorization.

812803939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 812803939 is about 28509.7165717234. The cubic root of 812803939 is about 933.2441291304.

The spelling of 812803939 in words is "eight hundred twelve million, eight hundred three thousand, nine hundred thirty-nine".