812417819 has 2 divisors, whose sum is σ = 812417820. Its totient is φ = 812417818.

The previous prime is 812417807. The next prime is 812417839. The reversal of 812417819 is 918714218.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 812417819 - 2⁸ = 812417563 is a prime.

It is a super-2 number, since 2×812417819² = 1320045425257433522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (812417839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406208909 + 406208910.

It is an arithmetic number, because the mean of its divisors is an integer number (406208910).

Almost surely, 2^812417819 is an apocalyptic number.

812417819 is a deficient number, since it is larger than the sum of its proper divisors (1).

812417819 is an equidigital number, since it uses as much as digits as its factorization.

812417819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 41.

The square root of 812417819 is about 28502.9440409232. The cubic root of 812417819 is about 933.0963274769.

The spelling of 812417819 in words is "eight hundred twelve million, four hundred seventeen thousand, eight hundred nineteen".