1683939 has 4 divisors (see below), whose sum is σ = 2245256. Its totient is φ = 1122624.

The previous prime is 1683887. The next prime is 1683949. The reversal of 1683939 is 9393861.

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

It is not a de Polignac number, because 1683939 - 2¹¹ = 1681891 is a prime.

It is a D-number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1683897 and 1683906.

It is not an unprimeable number, because it can be changed into a prime (1683949) 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, 280654 + ... + 280659.

It is an arithmetic number, because the mean of its divisors is an integer number (561314).

2^1683939 is an apocalyptic number.

1683939 is a deficient number, since it is larger than the sum of its proper divisors (561317).

1683939 is an equidigital number, since it uses as much as digits as its factorization.

1683939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561316.

The product of its digits is 34992, while the sum is 39.

The square root of 1683939 is about 1297.6667522904. Note that the first 3 decimals coincide. The cubic root of 1683939 is about 118.9712756978.

The spelling of 1683939 in words is "one million, six hundred eighty-three thousand, nine hundred thirty-nine".