1685302849 has 2 divisors, whose sum is σ = 1685302850. Its totient is φ = 1685302848.

The previous prime is 1685302847. The next prime is 1685302873. The reversal of 1685302849 is 9482035861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 912462849 + 772840000 = 30207^2 + 27800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685302849 - 2¹ = 1685302847 is a prime.

Together with 1685302847, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1685302799 and 1685302808.

It is not a weakly prime, because it can be changed into another prime (1685302847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842651424 + 842651425.

It is an arithmetic number, because the mean of its divisors is an integer number (842651425).

Almost surely, 2^1685302849 is an apocalyptic number.

It is an amenable number.

1685302849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685302849 is an equidigital number, since it uses as much as digits as its factorization.

1685302849 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 414720, while the sum is 46.

The square root of 1685302849 is about 41052.4402319765. The cubic root of 1685302849 is about 1190.0338594043.

The spelling of 1685302849 in words is "one billion, six hundred eighty-five million, three hundred two thousand, eight hundred forty-nine".