424399 has 4 divisors (see below), whose sum is σ = 425880. Its totient is φ = 422920.

The previous prime is 424397. The next prime is 424423. The reversal of 424399 is 993424.

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 424399 - 2¹ = 424397 is a prime.

It is a super-2 number, since 2×424399² = 360229022402, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 424399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157 + ... + 934.

It is an arithmetic number, because the mean of its divisors is an integer number (106470).

2⁴²⁴³⁹⁹ is an apocalyptic number.

424399 is a deficient number, since it is larger than the sum of its proper divisors (1481).

424399 is a wasteful number, since it uses less digits than its factorization.

424399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480.

The product of its digits is 7776, while the sum is 31.

The square root of 424399 is about 651.4591314887. The cubic root of 424399 is about 75.1492730739.

The spelling of 424399 in words is "four hundred twenty-four thousand, three hundred ninety-nine".