320239487 has 4 divisors (see below), whose sum is σ = 320355360. Its totient is φ = 320123616.

The previous prime is 320239483. The next prime is 320239501. The reversal of 320239487 is 784932023.

It is a happy number.

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 320239487 - 2² = 320239483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 320239487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320239483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53687 + ... + 59352.

It is an arithmetic number, because the mean of its divisors is an integer number (80088840).

Almost surely, 2^320239487 is an apocalyptic number.

320239487 is a deficient number, since it is larger than the sum of its proper divisors (115873).

320239487 is a wasteful number, since it uses less digits than its factorization.

320239487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115872.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 320239487 is about 17895.2364331964. The cubic root of 320239487 is about 684.1609682088.

The spelling of 320239487 in words is "three hundred twenty million, two hundred thirty-nine thousand, four hundred eighty-seven".