663827 has 2 divisors, whose sum is σ = 663828. Its totient is φ = 663826.

The previous prime is 663823. The next prime is 663853. The reversal of 663827 is 728366.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 663827 - 2² = 663823 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 663793 and 663802.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 663827.

It is not a weakly prime, because it can be changed into another prime (663821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331913 + 331914.

It is an arithmetic number, because the mean of its divisors is an integer number (331914).

2⁶⁶³⁸²⁷ is an apocalyptic number.

663827 is a deficient number, since it is larger than the sum of its proper divisors (1).

663827 is an equidigital number, since it uses as much as digits as its factorization.

663827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 32.

The square root of 663827 is about 814.7557916333. The cubic root of 663827 is about 87.2338360820.

The spelling of 663827 in words is "six hundred sixty-three thousand, eight hundred twenty-seven".