320865487 has 8 divisors (see below), whose sum is σ = 323456000. Its totient is φ = 318281400.

The previous prime is 320865473. The next prime is 320865509. The reversal of 320865487 is 784568023.

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

It is a cyclic number.

It is not a de Polignac number, because 320865487 - 2¹⁵ = 320832719 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 (320865437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159514 + ... + 161512.

It is an arithmetic number, because the mean of its divisors is an integer number (40432000).

Almost surely, 2^320865487 is an apocalyptic number.

320865487 is a deficient number, since it is larger than the sum of its proper divisors (2590513).

320865487 is a wasteful number, since it uses less digits than its factorization.

320865487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 320865487 is about 17912.7185820578. The cubic root of 320865487 is about 684.6064743770.

It can be divided in two parts, 32086 and 5487, that added together give a palindrome (37573).

The spelling of 320865487 in words is "three hundred twenty million, eight hundred sixty-five thousand, four hundred eighty-seven".