853663 has 2 divisors, whose sum is σ = 853664. Its totient is φ = 853662.

The previous prime is 853637. The next prime is 853667. The reversal of 853663 is 366358.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-853663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (853667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 426831 + 426832.

It is an arithmetic number, because the mean of its divisors is an integer number (426832).

2⁸⁵³⁶⁶³ is an apocalyptic number.

853663 is a deficient number, since it is larger than the sum of its proper divisors (1).

853663 is an equidigital number, since it uses as much as digits as its factorization.

853663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

The square root of 853663 is about 923.9388507905. The cubic root of 853663 is about 94.8627010176.

The spelling of 853663 in words is "eight hundred fifty-three thousand, six hundred sixty-three".