1683738643 has 2 divisors, whose sum is σ = 1683738644. Its totient is φ = 1683738642.

The previous prime is 1683738601. The next prime is 1683738647. The reversal of 1683738643 is 3468373861.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1683738643 - 2⁹ = 1683738131 is a prime.

It is not a weakly prime, because it can be changed into another prime (1683738647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841869321 + 841869322.

It is an arithmetic number, because the mean of its divisors is an integer number (841869322).

Almost surely, 2^1683738643 is an apocalyptic number.

1683738643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683738643 is an equidigital number, since it uses as much as digits as its factorization.

1683738643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The square root of 1683738643 is about 41033.3844936047. The cubic root of 1683738643 is about 1189.6655706419.

The spelling of 1683738643 in words is "one billion, six hundred eighty-three million, seven hundred thirty-eight thousand, six hundred forty-three".