1023663 has 8 divisors (see below), whose sum is σ = 1436800. Its totient is φ = 646488.

The previous prime is 1023653. The next prime is 1023697. The reversal of 1023663 is 3663201.

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

It is not a de Polignac number, because 1023663 - 2¹⁰ = 1022639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023643) 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, 8923 + ... + 9036.

It is an arithmetic number, because the mean of its divisors is an integer number (179600).

2^1023663 is an apocalyptic number.

1023663 is a deficient number, since it is larger than the sum of its proper divisors (413137).

1023663 is a wasteful number, since it uses less digits than its factorization.

1023663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17981.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1023663 is about 1011.7623238686. The cubic root of 1023663 is about 100.7826256588.

Adding to 1023663 its reverse (3663201), we get a palindrome (4686864).

The spelling of 1023663 in words is "one million, twenty-three thousand, six hundred sixty-three".