423889 has 4 divisors (see below), whose sum is σ = 430900. Its totient is φ = 416880.

The previous prime is 423887. The next prime is 423931. The reversal of 423889 is 988324.

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 173889 + 250000 = 417^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 423889 - 2¹ = 423887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (423883) 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, 3414 + ... + 3535.

It is an arithmetic number, because the mean of its divisors is an integer number (107725).

2⁴²³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

423889 is a deficient number, since it is larger than the sum of its proper divisors (7011).

423889 is an equidigital number, since it uses as much as digits as its factorization.

423889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7010.

The product of its digits is 13824, while the sum is 34.

The square root of 423889 is about 651.0675848174. The cubic root of 423889 is about 75.1191587305.

The spelling of 423889 in words is "four hundred twenty-three thousand, eight hundred eighty-nine".