1809868343 has 2 divisors, whose sum is σ = 1809868344. Its totient is φ = 1809868342.

The previous prime is 1809868301. The next prime is 1809868393. The reversal of 1809868343 is 3438689081.

It is an a-pointer prime, because the next prime (1809868393) can be obtained adding 1809868343 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1809868343 - 2¹⁴ = 1809851959 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1809868291 and 1809868300.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1809868393) 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, 904934171 + 904934172.

It is an arithmetic number, because the mean of its divisors is an integer number (904934172).

Almost surely, 2^1809868343 is an apocalyptic number.

1809868343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1809868343 is an equidigital number, since it uses as much as digits as its factorization.

1809868343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 995328, while the sum is 50.

The square root of 1809868343 is about 42542.5474437063. The cubic root of 1809868343 is about 1218.6593584204.

The spelling of 1809868343 in words is "one billion, eight hundred nine million, eight hundred sixty-eight thousand, three hundred forty-three".