320242009 has 4 divisors (see below), whose sum is σ = 325491940. Its totient is φ = 314992080.

The previous prime is 320242007. The next prime is 320242019. The reversal of 320242009 is 900242023.

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 137992009 + 182250000 = 11747^2 + 13500^2 .

It is a cyclic number.

It is not a de Polignac number, because 320242009 - 2¹ = 320242007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320242007) 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, 2624874 + ... + 2624995.

It is an arithmetic number, because the mean of its divisors is an integer number (81372985).

Almost surely, 2^320242009 is an apocalyptic number.

It is an amenable number.

320242009 is a deficient number, since it is larger than the sum of its proper divisors (5249931).

320242009 is an equidigital number, since it uses as much as digits as its factorization.

320242009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5249930.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 320242009 is about 17895.3068987374. The cubic root of 320242009 is about 684.1627642079.

The spelling of 320242009 in words is "three hundred twenty million, two hundred forty-two thousand, nine".