320989047 has 4 divisors (see below), whose sum is σ = 427985400. Its totient is φ = 213992696.

The previous prime is 320989037. The next prime is 320989049. The reversal of 320989047 is 740989023.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 320989047 - 2⁷ = 320988919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320989049) 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, 53498172 + ... + 53498177.

It is an arithmetic number, because the mean of its divisors is an integer number (106996350).

Almost surely, 2^320989047 is an apocalyptic number.

320989047 is a deficient number, since it is larger than the sum of its proper divisors (106996353).

320989047 is a wasteful number, since it uses less digits than its factorization.

320989047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106996352.

The product of its (nonzero) digits is 108864, while the sum is 42.

The square root of 320989047 is about 17916.1671961388. The cubic root of 320989047 is about 684.6943399818.

The spelling of 320989047 in words is "three hundred twenty million, nine hundred eighty-nine thousand, forty-seven".