1668835793 has 2 divisors, whose sum is σ = 1668835794. Its totient is φ = 1668835792.

The previous prime is 1668835789. The next prime is 1668835801. The reversal of 1668835793 is 3975388661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1405650064 + 263185729 = 37492^2 + 16223^2 .

It is a cyclic number.

It is not a de Polignac number, because 1668835793 - 2² = 1668835789 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668835733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834417896 + 834417897.

It is an arithmetic number, because the mean of its divisors is an integer number (834417897).

Almost surely, 2^1668835793 is an apocalyptic number.

It is an amenable number.

1668835793 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668835793 is an equidigital number, since it uses as much as digits as its factorization.

1668835793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The square root of 1668835793 is about 40851.3866716908. The cubic root of 1668835793 is about 1186.1452352457.

The spelling of 1668835793 in words is "one billion, six hundred sixty-eight million, eight hundred thirty-five thousand, seven hundred ninety-three".