423849 has 4 divisors (see below), whose sum is σ = 565136. Its totient is φ = 282564.

The previous prime is 423847. The next prime is 423853. The reversal of 423849 is 948324.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 423849 - 2¹ = 423847 is a prime.

It is a D-number.

It is a Duffinian number.

423849 is a lucky number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70639 + ... + 70644.

It is an arithmetic number, because the mean of its divisors is an integer number (141284).

2⁴²³⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

423849 is a deficient number, since it is larger than the sum of its proper divisors (141287).

423849 is a wasteful number, since it uses less digits than its factorization.

423849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141286.

The product of its digits is 6912, while the sum is 30.

The square root of 423849 is about 651.0368653156. The cubic root of 423849 is about 75.1167957999.

The spelling of 423849 in words is "four hundred twenty-three thousand, eight hundred forty-nine".