423239 has 4 divisors (see below), whose sum is σ = 429624. Its totient is φ = 416856.

The previous prime is 423233. The next prime is 423251. The reversal of 423239 is 932324.

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 423239 - 2¹⁶ = 357703 is a prime.

It is a super-2 number, since 2×423239² = 358262502242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423233) 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, 3092 + ... + 3225.

It is an arithmetic number, because the mean of its divisors is an integer number (107406).

2⁴²³²³⁹ is an apocalyptic number.

423239 is a deficient number, since it is larger than the sum of its proper divisors (6385).

423239 is an equidigital number, since it uses as much as digits as its factorization.

423239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6384.

The product of its digits is 1296, while the sum is 23.

The square root of 423239 is about 650.5682131798. The cubic root of 423239 is about 75.0807426734.

The spelling of 423239 in words is "four hundred twenty-three thousand, two hundred thirty-nine".