813359903 has 2 divisors, whose sum is σ = 813359904. Its totient is φ = 813359902.

The previous prime is 813359887. The next prime is 813359933. The reversal of 813359903 is 309953318.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 813359903 - 2⁴ = 813359887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813359933) 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, 406679951 + 406679952.

It is an arithmetic number, because the mean of its divisors is an integer number (406679952).

Almost surely, 2^813359903 is an apocalyptic number.

813359903 is a deficient number, since it is larger than the sum of its proper divisors (1).

813359903 is an equidigital number, since it uses as much as digits as its factorization.

813359903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 813359903 is about 28519.4653351005. The cubic root of 813359903 is about 933.4568626323.

The spelling of 813359903 in words is "eight hundred thirteen million, three hundred fifty-nine thousand, nine hundred three".