320645047 has 8 divisors (see below), whose sum is σ = 336027744. Its totient is φ = 305382528.

The previous prime is 320645033. The next prime is 320645063. The reversal of 320645047 is 740546023.

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-320645047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320645747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24558 + ... + 35275.

It is an arithmetic number, because the mean of its divisors is an integer number (42003468).

Almost surely, 2^320645047 is an apocalyptic number.

320645047 is a deficient number, since it is larger than the sum of its proper divisors (15382697).

320645047 is a wasteful number, since it uses less digits than its factorization.

320645047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60089.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 320645047 is about 17906.5643550068. The cubic root of 320645047 is about 684.4496597295.

The spelling of 320645047 in words is "three hundred twenty million, six hundred forty-five thousand, forty-seven".