663423 has 16 divisors (see below), whose sum is σ = 948480. Its totient is φ = 411264.

The previous prime is 663409. The next prime is 663437. The reversal of 663423 is 324366.

It is an interprime number because it is at equal distance from previous prime (663409) and next prime (663437).

It is not a de Polignac number, because 663423 - 2⁴ = 663407 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 663393 and 663402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5815 + ... + 5927.

It is an arithmetic number, because the mean of its divisors is an integer number (59280).

2⁶⁶³⁴²³ is an apocalyptic number.

663423 is a deficient number, since it is larger than the sum of its proper divisors (285057).

663423 is a wasteful number, since it uses less digits than its factorization.

663423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238.

The product of its digits is 2592, while the sum is 24.

The square root of 663423 is about 814.5078268501. The cubic root of 663423 is about 87.2161358771.

Adding to 663423 its reverse (324366), we get a palindrome (987789).

The spelling of 663423 in words is "six hundred sixty-three thousand, four hundred twenty-three".