816224837 has 2 divisors, whose sum is σ = 816224838. Its totient is φ = 816224836.

The previous prime is 816224803. The next prime is 816224867. The reversal of 816224837 is 738422618.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 704690116 + 111534721 = 26546^2 + 10561^2 .

It is a cyclic number.

It is not a de Polignac number, because 816224837 - 2²⁶ = 749115973 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 816224794 and 816224803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (816224867) 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, 408112418 + 408112419.

It is an arithmetic number, because the mean of its divisors is an integer number (408112419).

Almost surely, 2^816224837 is an apocalyptic number.

It is an amenable number.

816224837 is a deficient number, since it is larger than the sum of its proper divisors (1).

816224837 is an equidigital number, since it uses as much as digits as its factorization.

816224837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129024, while the sum is 41.

The square root of 816224837 is about 28569.6488777864. The cubic root of 816224837 is about 934.5515639639.

The spelling of 816224837 in words is "eight hundred sixteen million, two hundred twenty-four thousand, eight hundred thirty-seven".