812800003 has 2 divisors, whose sum is σ = 812800004. Its totient is φ = 812800002.

The previous prime is 812799991. The next prime is 812800019. The reversal of 812800003 is 300008218.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-812800003 is a prime.

It is not a weakly prime, because it can be changed into another prime (812806003) 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, 406400001 + 406400002.

It is an arithmetic number, because the mean of its divisors is an integer number (406400002).

Almost surely, 2^812800003 is an apocalyptic number.

812800003 is a deficient number, since it is larger than the sum of its proper divisors (1).

812800003 is an equidigital number, since it uses as much as digits as its factorization.

812800003 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 812800003 is about 28509.6475425425. The cubic root of 812800003 is about 933.2426227176.

The spelling of 812800003 in words is "eight hundred twelve million, eight hundred thousand, three".