1685353 has 4 divisors (see below), whose sum is σ = 1688148. Its totient is φ = 1682560.

The previous prime is 1685323. The next prime is 1685381. The reversal of 1685353 is 3535861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3535861 = 7 ⋅505123.

It can be written as a sum of positive squares in 2 ways, for example, as 896809 + 788544 = 947^2 + 888^2 .

It is a cyclic number.

It is not a de Polignac number, because 1685353 - 2¹⁷ = 1554281 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.

It is a plaindrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (1685323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76 + ... + 1837.

It is an arithmetic number, because the mean of its divisors is an integer number (422037).

2^1685353 is an apocalyptic number.

It is an amenable number.

1685353 is a deficient number, since it is larger than the sum of its proper divisors (2795).

1685353 is an equidigital number, since it uses as much as digits as its factorization.

1685353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2794.

The product of its digits is 10800, while the sum is 31.

The square root of 1685353 is about 1298.2114619737. The cubic root of 1685353 is about 119.0045663573.

The spelling of 1685353 in words is "one million, six hundred eighty-five thousand, three hundred fifty-three".