1686053 has 4 divisors (see below), whose sum is σ = 1731660. Its totient is φ = 1640448.

The previous prime is 1686049. The next prime is 1686067. The reversal of 1686053 is 3506861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3506861 = 307 ⋅11423.

It can be written as a sum of positive squares in 2 ways, for example, as 1555009 + 131044 = 1247^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 1686053 - 2² = 1686049 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1686353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22748 + ... + 22821.

It is an arithmetic number, because the mean of its divisors is an integer number (432915).

2^1686053 is an apocalyptic number.

It is an amenable number.

1686053 is a deficient number, since it is larger than the sum of its proper divisors (45607).

1686053 is an equidigital number, since it uses as much as digits as its factorization.

1686053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45606.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1686053 is about 1298.4810356721. The cubic root of 1686053 is about 119.0210399914.

The spelling of 1686053 in words is "one million, six hundred eighty-six thousand, fifty-three".