3681998843 has 2 divisors, whose sum is σ = 3681998844. Its totient is φ = 3681998842.

The previous prime is 3681998813. The next prime is 3681998851. The reversal of 3681998843 is 3488991863.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3681998843 - 2⁸ = 3681998587 is a prime.

It is not a weakly prime, because it can be changed into another prime (3681998813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840999421 + 1840999422.

It is an arithmetic number, because the mean of its divisors is an integer number (1840999422).

Almost surely, 2^3681998843 is an apocalyptic number.

3681998843 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681998843 is an equidigital number, since it uses as much as digits as its factorization.

3681998843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8957952, while the sum is 59.

The square root of 3681998843 is about 60679.4762914117. The cubic root of 3681998843 is about 1544.1680034274.

The spelling of 3681998843 in words is "three billion, six hundred eighty-one million, nine hundred ninety-eight thousand, eight hundred forty-three".