1639223 has 2 divisors, whose sum is σ = 1639224. Its totient is φ = 1639222.

The previous prime is 1639217. The next prime is 1639229. The reversal of 1639223 is 3229361.

It is a balanced prime because it is at equal distance from previous prime (1639217) and next prime (1639229).

It is a cyclic number.

It is not a de Polignac number, because 1639223 - 2⁶ = 1639159 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1639192 and 1639201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1639229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 819611 + 819612.

It is an arithmetic number, because the mean of its divisors is an integer number (819612).

2^1639223 is an apocalyptic number.

1639223 is a deficient number, since it is larger than the sum of its proper divisors (1).

1639223 is an equidigital number, since it uses as much as digits as its factorization.

1639223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 26.

The square root of 1639223 is about 1280.3214440132. The cubic root of 1639223 is about 117.9087439617.

The spelling of 1639223 in words is "one million, six hundred thirty-nine thousand, two hundred twenty-three".