1683843549907 has 2 divisors, whose sum is σ = 1683843549908. Its totient is φ = 1683843549906.

The previous prime is 1683843549859. The next prime is 1683843549929. The reversal of 1683843549907 is 7099453483861.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1683843549907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1683843589907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841921774953 + 841921774954.

It is an arithmetic number, because the mean of its divisors is an integer number (841921774954).

Almost surely, 2^{1683843549907} is an apocalyptic number.

1683843549907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683843549907 is an equidigital number, since it uses as much as digits as its factorization.

1683843549907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 156764160, while the sum is 67.

The spelling of 1683843549907 in words is "one trillion, six hundred eighty-three billion, eight hundred forty-three million, five hundred forty-nine thousand, nine hundred seven".