813204671 has 2 divisors, whose sum is σ = 813204672. Its totient is φ = 813204670.

The previous prime is 813204649. The next prime is 813204719. The reversal of 813204671 is 176402318.

813204671 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 813204671 - 2⁶ = 813204607 is a prime.

It is a super-2 number, since 2×813204671² = 1322603673872436482, which contains 22 as substring.

It is equal to p_41790308 and since 813204671 and 41790308 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813204971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406602335 + 406602336.

It is an arithmetic number, because the mean of its divisors is an integer number (406602336).

Almost surely, 2^813204671 is an apocalyptic number.

813204671 is a deficient number, since it is larger than the sum of its proper divisors (1).

813204671 is an equidigital number, since it uses as much as digits as its factorization.

813204671 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 813204671 is about 28516.7436955905. The cubic root of 813204671 is about 933.3974745744.

Adding to 813204671 its reverse (176402318), we get a palindrome (989606989).

The spelling of 813204671 in words is "eight hundred thirteen million, two hundred four thousand, six hundred seventy-one".