320291609 has 8 divisors (see below), whose sum is σ = 350414400. Its totient is φ = 290336400.

The previous prime is 320291599. The next prime is 320291623. The reversal of 320291609 is 906192023.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320291609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320291009) 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 7 ways as a sum of consecutive naturals, for example, 37877 + ... + 45554.

It is an arithmetic number, because the mean of its divisors is an integer number (43801800).

Almost surely, 2^320291609 is an apocalyptic number.

It is an amenable number.

320291609 is a deficient number, since it is larger than the sum of its proper divisors (30122791).

320291609 is a wasteful number, since it uses less digits than its factorization.

320291609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83791.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 320291609 is about 17896.6926832865. The cubic root of 320291609 is about 684.1980840809.

The spelling of 320291609 in words is "three hundred twenty million, two hundred ninety-one thousand, six hundred nine".