1806844229 has 2 divisors, whose sum is σ = 1806844230. Its totient is φ = 1806844228.

The previous prime is 1806844183. The next prime is 1806844241. The reversal of 1806844229 is 9224486081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1300684225 + 506160004 = 36065^2 + 22498^2 .

It is an emirp because it is prime and its reverse (9224486081) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1806844229 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1806844229.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1806844279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 903422114 + 903422115.

It is an arithmetic number, because the mean of its divisors is an integer number (903422115).

Almost surely, 2^1806844229 is an apocalyptic number.

It is an amenable number.

1806844229 is a deficient number, since it is larger than the sum of its proper divisors (1).

1806844229 is an equidigital number, since it uses as much as digits as its factorization.

1806844229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 1806844229 is about 42506.9903545287. The cubic root of 1806844229 is about 1217.9802262656.

The spelling of 1806844229 in words is "one billion, eight hundred six million, eight hundred forty-four thousand, two hundred twenty-nine".