1683843549931 has 2 divisors, whose sum is σ = 1683843549932. Its totient is φ = 1683843549930.

The previous prime is 1683843549929. The next prime is 1683843549991. The reversal of 1683843549931 is 1399453483861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1683843549931 - 2¹ = 1683843549929 is a prime.

It is a super-2 number, since 2×1683843549931² (a number of 25 digits) contains 22 as substring.

Together with 1683843549929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1683843549991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841921774965 + 841921774966.

It is an arithmetic number, because the mean of its divisors is an integer number (841921774966).

Almost surely, 2^{1683843549931} is an apocalyptic number.

1683843549931 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683843549931 is an equidigital number, since it uses as much as digits as its factorization.

1683843549931 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 67184640, while the sum is 64.

The spelling of 1683843549931 in words is "one trillion, six hundred eighty-three billion, eight hundred forty-three million, five hundred forty-nine thousand, nine hundred thirty-one".