683663 has 4 divisors (see below), whose sum is σ = 685608. Its totient is φ = 681720.

The previous prime is 683653. The next prime is 683681. The reversal of 683663 is 366386.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 683663 - 2⁸ = 683407 is a prime.

It is a Duffinian number.

Its product of digits (15552) is a multiple of the sum of its prime divisors (1944).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281 + ... + 1202.

It is an arithmetic number, because the mean of its divisors is an integer number (171402).

2⁶⁸³⁶⁶³ is an apocalyptic number.

683663 is a deficient number, since it is larger than the sum of its proper divisors (1945).

683663 is a wasteful number, since it uses less digits than its factorization.

683663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1944.

The product of its digits is 15552, while the sum is 32.

The square root of 683663 is about 826.8391621107. The cubic root of 683663 is about 88.0942086816.

The spelling of 683663 in words is "six hundred eighty-three thousand, six hundred sixty-three".