1683697 has 4 divisors (see below), whose sum is σ = 1782756. Its totient is φ = 1584640.

The previous prime is 1683691. The next prime is 1683719. The reversal of 1683697 is 7963861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7963861 = 1619 ⋅4919.

It can be written as a sum of positive squares in 2 ways, for example, as 853776 + 829921 = 924^2 + 911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683697 - 2¹¹ = 1681649 is a prime.

1683697 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1683691) 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, 49504 + ... + 49537.

It is an arithmetic number, because the mean of its divisors is an integer number (445689).

2^1683697 is an apocalyptic number.

1683697 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1683697 is a deficient number, since it is larger than the sum of its proper divisors (99059).

1683697 is an equidigital number, since it uses as much as digits as its factorization.

1683697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99058.

The product of its digits is 54432, while the sum is 40.

The square root of 1683697 is about 1297.5735046617. The cubic root of 1683697 is about 118.9655762775.

The spelling of 1683697 in words is "one million, six hundred eighty-three thousand, six hundred ninety-seven".