1684364729 has 2 divisors, whose sum is σ = 1684364730. Its totient is φ = 1684364728.

The previous prime is 1684364713. The next prime is 1684364749. The reversal of 1684364729 is 9274634861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1001849104 + 682515625 = 31652^2 + 26125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1684364729 - 2⁴ = 1684364713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1684364749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842182364 + 842182365.

It is an arithmetic number, because the mean of its divisors is an integer number (842182365).

Almost surely, 2^1684364729 is an apocalyptic number.

It is an amenable number.

1684364729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684364729 is an equidigital number, since it uses as much as digits as its factorization.

1684364729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 50.

The square root of 1684364729 is about 41041.0127677181. The cubic root of 1684364729 is about 1189.8130085396.

The spelling of 1684364729 in words is "one billion, six hundred eighty-four million, three hundred sixty-four thousand, seven hundred twenty-nine".