1680853 has 4 divisors (see below), whose sum is σ = 1693260. Its totient is φ = 1668448.

The previous prime is 1680839. The next prime is 1680859. The reversal of 1680853 is 3580861.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1340964 + 339889 = 1158^2 + 583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1680853 - 2⁵ = 1680821 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1680853 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1680859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5998 + ... + 6271.

It is an arithmetic number, because the mean of its divisors is an integer number (423315).

2^1680853 is an apocalyptic number.

It is an amenable number.

1680853 is a deficient number, since it is larger than the sum of its proper divisors (12407).

1680853 is a wasteful number, since it uses less digits than its factorization.

1680853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12406.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 1680853 is about 1296.4771498179. The cubic root of 1680853 is about 118.8985553551.

It can be divided in two parts, 16808 and 53, that added together give a palindrome (16861).

The spelling of 1680853 in words is "one million, six hundred eighty thousand, eight hundred fifty-three".