423817 has 4 divisors (see below), whose sum is σ = 434196. Its totient is φ = 413440.

The previous prime is 423803. The next prime is 423823. The reversal of 423817 is 718324.

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

It can be written as a sum of positive squares in 2 ways, for example, as 19321 + 404496 = 139^2 + 636^2 .

It is a cyclic number.

It is not a de Polignac number, because 423817 - 2¹⁵ = 391049 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 423791 and 423800.

It is not an unprimeable number, because it can be changed into a prime (423847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5128 + ... + 5209.

It is an arithmetic number, because the mean of its divisors is an integer number (108549).

2⁴²³⁸¹⁷ is an apocalyptic number.

It is an amenable number.

423817 is a deficient number, since it is larger than the sum of its proper divisors (10379).

423817 is a wasteful number, since it uses less digits than its factorization.

423817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10378.

The product of its digits is 1344, while the sum is 25.

The square root of 423817 is about 651.0122886705. The cubic root of 423817 is about 75.1149053484.

The spelling of 423817 in words is "four hundred twenty-three thousand, eight hundred seventeen".