320606345 has 4 divisors (see below), whose sum is σ = 384727620. Its totient is φ = 256485072.

The previous prime is 320606327. The next prime is 320606353. The reversal of 320606345 is 543606023.

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 208860304 + 111746041 = 14452^2 + 10571^2 .

It is a cyclic number.

It is not a de Polignac number, because 320606345 - 2¹⁶ = 320540809 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32060630 + ... + 32060639.

It is an arithmetic number, because the mean of its divisors is an integer number (96181905).

Almost surely, 2^320606345 is an apocalyptic number.

It is an amenable number.

320606345 is a deficient number, since it is larger than the sum of its proper divisors (64121275).

320606345 is an equidigital number, since it uses as much as digits as its factorization.

320606345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64121274.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 320606345 is about 17905.4836572487. The cubic root of 320606345 is about 684.4221208286.

The spelling of 320606345 in words is "three hundred twenty million, six hundred six thousand, three hundred forty-five".