1684223 has 2 divisors, whose sum is σ = 1684224. Its totient is φ = 1684222.

The previous prime is 1684187. The next prime is 1684229. The reversal of 1684223 is 3224861.

It is a strong prime.

It is an emirp because it is prime and its reverse (3224861) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1684223 is a prime.

It is a super-2 number, since 2×1684223² = 5673214227458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1684192 and 1684201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1684229) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 842111 + 842112.

It is an arithmetic number, because the mean of its divisors is an integer number (842112).

2^1684223 is an apocalyptic number.

1684223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1684223 is an equidigital number, since it uses as much as digits as its factorization.

1684223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 1684223 is about 1297.7761748468. The cubic root of 1684223 is about 118.9779635772.

The spelling of 1684223 in words is "one million, six hundred eighty-four thousand, two hundred twenty-three".