423811 has 4 divisors (see below), whose sum is σ = 427000. Its totient is φ = 420624.

The previous prime is 423803. The next prime is 423823. The reversal of 423811 is 118324.

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 423811 - 2³ = 423803 is a prime.

It is a Duffinian number.

423811 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (420811) 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, 1386 + ... + 1663.

It is an arithmetic number, because the mean of its divisors is an integer number (106750).

2⁴²³⁸¹¹ is an apocalyptic number.

423811 is a deficient number, since it is larger than the sum of its proper divisors (3189).

423811 is a wasteful number, since it uses less digits than its factorization.

423811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3188.

The product of its digits is 192, while the sum is 19.

The square root of 423811 is about 651.0076804462. The cubic root of 423811 is about 75.1145508781.

The spelling of 423811 in words is "four hundred twenty-three thousand, eight hundred eleven".