812440807 has 2 divisors, whose sum is σ = 812440808. Its totient is φ = 812440806.

The previous prime is 812440801. The next prime is 812440813. The reversal of 812440807 is 708044218.

It is a balanced prime because it is at equal distance from previous prime (812440801) and next prime (812440813).

It is a cyclic number.

It is not a de Polignac number, because 812440807 - 2¹⁵ = 812408039 is a prime.

It is a super-2 number, since 2×812440807² = 1320120129757622498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812440801) 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, 406220403 + 406220404.

It is an arithmetic number, because the mean of its divisors is an integer number (406220404).

Almost surely, 2^812440807 is an apocalyptic number.

812440807 is a deficient number, since it is larger than the sum of its proper divisors (1).

812440807 is an equidigital number, since it uses as much as digits as its factorization.

812440807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 812440807 is about 28503.3472946600. The cubic root of 812440807 is about 933.1051282916.

The spelling of 812440807 in words is "eight hundred twelve million, four hundred forty thousand, eight hundred seven".