1816540343 has 2 divisors, whose sum is σ = 1816540344. Its totient is φ = 1816540342.

The previous prime is 1816540339. The next prime is 1816540351. The reversal of 1816540343 is 3430456181.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1816540343 - 2² = 1816540339 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1816540333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 908270171 + 908270172.

It is an arithmetic number, because the mean of its divisors is an integer number (908270172).

Almost surely, 2^1816540343 is an apocalyptic number.

1816540343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1816540343 is an equidigital number, since it uses as much as digits as its factorization.

1816540343 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1816540343 is about 42620.8909221757. The cubic root of 1816540343 is about 1220.1550333752.

The spelling of 1816540343 in words is "one billion, eight hundred sixteen million, five hundred forty thousand, three hundred forty-three".