816227837 has 2 divisors, whose sum is σ = 816227838. Its totient is φ = 816227836.

The previous prime is 816227833. The next prime is 816227843. The reversal of 816227837 is 738722618.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620059801 + 196168036 = 24901^2 + 14006^2 .

It is a cyclic number.

It is not a de Polignac number, because 816227837 - 2² = 816227833 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816227831) 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, 408113918 + 408113919.

It is an arithmetic number, because the mean of its divisors is an integer number (408113919).

Almost surely, 2^816227837 is an apocalyptic number.

It is an amenable number.

816227837 is a deficient number, since it is larger than the sum of its proper divisors (1).

816227837 is an equidigital number, since it uses as much as digits as its factorization.

816227837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 44.

The square root of 816227837 is about 28569.7013810085. The cubic root of 816227837 is about 934.5527089308.

The spelling of 816227837 in words is "eight hundred sixteen million, two hundred twenty-seven thousand, eight hundred thirty-seven".