1816650443 has 2 divisors, whose sum is σ = 1816650444. Its totient is φ = 1816650442.

The previous prime is 1816650403. The next prime is 1816650463. The reversal of 1816650443 is 3440566181.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1816650443 - 2¹⁶ = 1816584907 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1816650397 and 1816650406.

It is not a weakly prime, because it can be changed into another prime (1816650403) 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, 908325221 + 908325222.

It is an arithmetic number, because the mean of its divisors is an integer number (908325222).

Almost surely, 2^1816650443 is an apocalyptic number.

1816650443 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816650443 is an equidigital number, since it uses as much as digits as its factorization.

1816650443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1816650443 is about 42622.1825227193. The cubic root of 1816650443 is about 1220.1796839618.

The spelling of 1816650443 in words is "one billion, eight hundred sixteen million, six hundred fifty thousand, four hundred forty-three".