663289 has 8 divisors (see below), whose sum is σ = 766368. Its totient is φ = 567360.

The previous prime is 663283. The next prime is 663301. The reversal of 663289 is 982366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 663289 - 2³ = 663281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (663281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1587 + ... + 1960.

It is an arithmetic number, because the mean of its divisors is an integer number (95796).

2⁶⁶³²⁸⁹ is an apocalyptic number.

It is an amenable number.

663289 is a deficient number, since it is larger than the sum of its proper divisors (103079).

663289 is a wasteful number, since it uses less digits than its factorization.

663289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3575.

The product of its digits is 15552, while the sum is 34.

The square root of 663289 is about 814.4255644318. The cubic root of 663289 is about 87.2102634302.

The spelling of 663289 in words is "six hundred sixty-three thousand, two hundred eighty-nine".