320429 has 4 divisors (see below), whose sum is σ = 325920. Its totient is φ = 314940.

The previous prime is 320417. The next prime is 320431. The reversal of 320429 is 924023.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320429 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 320429.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320429.

It is not an unprimeable number, because it can be changed into a prime (320449) 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, 2657 + ... + 2774.

It is an arithmetic number, because the mean of its divisors is an integer number (81480).

2³²⁰⁴²⁹ is an apocalyptic number.

It is an amenable number.

320429 is a deficient number, since it is larger than the sum of its proper divisors (5491).

320429 is an equidigital number, since it uses as much as digits as its factorization.

320429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5490.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 320429 is about 566.0644839592. The cubic root of 320429 is about 68.4295900382.

The spelling of 320429 in words is "three hundred twenty thousand, four hundred twenty-nine".