1683843549929 has 2 divisors, whose sum is σ = 1683843549930. Its totient is φ = 1683843549928.

The previous prime is 1683843549907. The next prime is 1683843549931. The reversal of 1683843549929 is 9299453483861.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1597827458704 + 86016091225 = 1264052^2 + 293285^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683843549929 - 2¹² = 1683843545833 is a prime.

Together with 1683843549931, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1683843548929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841921774964 + 841921774965.

It is an arithmetic number, because the mean of its divisors is an integer number (841921774965).

Almost surely, 2^{1683843549929} is an apocalyptic number.

It is an amenable number.

1683843549929 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683843549929 is an equidigital number, since it uses as much as digits as its factorization.

1683843549929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 403107840, while the sum is 71.

The spelling of 1683843549929 in words is "one trillion, six hundred eighty-three billion, eight hundred forty-three million, five hundred forty-nine thousand, nine hundred twenty-nine".