423659 has 4 divisors (see below), whose sum is σ = 425040. Its totient is φ = 422280.

The previous prime is 423649. The next prime is 423667. The reversal of 423659 is 956324.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 423659 - 2⁸ = 423403 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423659.

It is not an unprimeable number, because it can be changed into a prime (423649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (106260).

2⁴²³⁶⁵⁹ is an apocalyptic number.

423659 is a deficient number, since it is larger than the sum of its proper divisors (1381).

423659 is an equidigital number, since it uses as much as digits as its factorization.

423659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380.

The product of its digits is 6480, while the sum is 29.

The square root of 423659 is about 650.8909278827. The cubic root of 423659 is about 75.1055698489.

The spelling of 423659 in words is "four hundred twenty-three thousand, six hundred fifty-nine".