812404237 has 2 divisors, whose sum is σ = 812404238. Its totient is φ = 812404236.

The previous prime is 812404207. The next prime is 812404303. The reversal of 812404237 is 732404218.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732730761 + 79673476 = 27069^2 + 8926^2 .

It is a cyclic number.

It is not a de Polignac number, because 812404237 - 2¹¹ = 812402189 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 812404199 and 812404208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (812404207) 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, 406202118 + 406202119.

It is an arithmetic number, because the mean of its divisors is an integer number (406202119).

Almost surely, 2^812404237 is an apocalyptic number.

It is an amenable number.

812404237 is a deficient number, since it is larger than the sum of its proper divisors (1).

812404237 is an equidigital number, since it uses as much as digits as its factorization.

812404237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 812404237 is about 28502.7057838374. The cubic root of 812404237 is about 933.0911276136.

The spelling of 812404237 in words is "eight hundred twelve million, four hundred four thousand, two hundred thirty-seven".