320774647 has 4 divisors (see below), whose sum is σ = 321207120. Its totient is φ = 320342176.

The previous prime is 320774633. The next prime is 320774653. The reversal of 320774647 is 746477023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746477023 = 29 ⋅25740587.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-320774647 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320774147) 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 3 ways as a sum of consecutive naturals, for example, 215122 + ... + 216607.

It is an arithmetic number, because the mean of its divisors is an integer number (80301780).

Almost surely, 2^320774647 is an apocalyptic number.

320774647 is a deficient number, since it is larger than the sum of its proper divisors (432473).

320774647 is an equidigital number, since it uses as much as digits as its factorization.

320774647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 432472.

The product of its (nonzero) digits is 197568, while the sum is 40.

The square root of 320774647 is about 17910.1827740534. The cubic root of 320774647 is about 684.5418621284.

The spelling of 320774647 in words is "three hundred twenty million, seven hundred seventy-four thousand, six hundred forty-seven".