1663223 has 2 divisors, whose sum is σ = 1663224. Its totient is φ = 1663222.

The previous prime is 1663219. The next prime is 1663267. The reversal of 1663223 is 3223661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1663223 - 2² = 1663219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1663273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 831611 + 831612.

It is an arithmetic number, because the mean of its divisors is an integer number (831612).

2^1663223 is an apocalyptic number.

1663223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1663223 is an equidigital number, since it uses as much as digits as its factorization.

1663223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 23.

The square root of 1663223 is about 1289.6600327218. The cubic root of 1663223 is about 118.4813954781.

Adding to 1663223 its reverse (3223661), we get a palindrome (4886884).

The spelling of 1663223 in words is "one million, six hundred sixty-three thousand, two hundred twenty-three".