869663 has 2 divisors, whose sum is σ = 869664. Its totient is φ = 869662.

The previous prime is 869657. The next prime is 869683. The reversal of 869663 is 366968.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 869663 - 2⁶ = 869599 is a prime.

It is a Chen prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869683) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434831 + 434832.

It is an arithmetic number, because the mean of its divisors is an integer number (434832).

2⁸⁶⁹⁶⁶³ is an apocalyptic number.

869663 is a deficient number, since it is larger than the sum of its proper divisors (1).

869663 is an equidigital number, since it uses as much as digits as its factorization.

869663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46656, while the sum is 38.

The square root of 869663 is about 932.5572368493. The cubic root of 869663 is about 95.4516993036.

The spelling of 869663 in words is "eight hundred sixty-nine thousand, six hundred sixty-three".