1685322647 has 2 divisors, whose sum is σ = 1685322648. Its totient is φ = 1685322646.

The previous prime is 1685322641. The next prime is 1685322679. The reversal of 1685322647 is 7462235861.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1685322647 - 2¹⁶ = 1685257111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1685322598 and 1685322607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1685322641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842661323 + 842661324.

It is an arithmetic number, because the mean of its divisors is an integer number (842661324).

Almost surely, 2^1685322647 is an apocalyptic number.

1685322647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1685322647 is an equidigital number, since it uses as much as digits as its factorization.

1685322647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 44.

The square root of 1685322647 is about 41052.6813618794. The cubic root of 1685322647 is about 1190.0385193379.

The spelling of 1685322647 in words is "one billion, six hundred eighty-five million, three hundred twenty-two thousand, six hundred forty-seven".