423899 has 12 divisors (see below), whose sum is σ = 507528. Its totient is φ = 352800.

The previous prime is 423887. The next prime is 423931. The reversal of 423899 is 998324.

It is not a de Polignac number, because 423899 - 2⁴ = 423883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (423859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1904 + ... + 2114.

It is an arithmetic number, because the mean of its divisors is an integer number (42294).

2⁴²³⁸⁹⁹ is an apocalyptic number.

423899 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

423899 is a deficient number, since it is larger than the sum of its proper divisors (83629).

423899 is a wasteful number, since it uses less digits than its factorization.

423899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 259 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 423899 is about 651.0752644664. The cubic root of 423899 is about 75.1197494399.

It can be divided in two parts, 42389 and 9, that multiplied together give a triangular number (381501 = T₈₇₃).

The spelling of 423899 in words is "four hundred twenty-three thousand, eight hundred ninety-nine".