1684117973 has 2 divisors, whose sum is σ = 1684117974. Its totient is φ = 1684117972.

The previous prime is 1684117969. The next prime is 1684118003. The reversal of 1684117973 is 3797114861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1684117444 + 529 = 41038^2 + 23^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684117973 - 2² = 1684117969 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684117913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842058986 + 842058987.

It is an arithmetic number, because the mean of its divisors is an integer number (842058987).

Almost surely, 2^1684117973 is an apocalyptic number.

It is an amenable number.

1684117973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684117973 is an equidigital number, since it uses as much as digits as its factorization.

1684117973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 47.

The square root of 1684117973 is about 41038.0064452454. The cubic root of 1684117973 is about 1189.7549039751.

The spelling of 1684117973 in words is "one billion, six hundred eighty-four million, one hundred seventeen thousand, nine hundred seventy-three".