1683613 has 4 divisors (see below), whose sum is σ = 1702620. Its totient is φ = 1664608.

The previous prime is 1683601. The next prime is 1683631. The reversal of 1683613 is 3163861.

1683613 = 917² + 918².

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 840889 + 842724 = 917^2 + 918^2 .

It is a cyclic number.

It is not a de Polignac number, because 1683613 - 2⁵ = 1683581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1683673) 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, 9370 + ... + 9547.

It is an arithmetic number, because the mean of its divisors is an integer number (425655).

2^1683613 is an apocalyptic number.

1683613 is the 918-th centered square number.

It is an amenable number.

1683613 is a deficient number, since it is larger than the sum of its proper divisors (19007).

1683613 is an equidigital number, since it uses as much as digits as its factorization.

1683613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19006.

The product of its digits is 2592, while the sum is 28.

The square root of 1683613 is about 1297.5411361494. The cubic root of 1683613 is about 118.9635978387.

The spelling of 1683613 in words is "one million, six hundred eighty-three thousand, six hundred thirteen".