320887 has 4 divisors (see below), whose sum is σ = 366736. Its totient is φ = 275040.

The previous prime is 320867. The next prime is 320899. The reversal of 320887 is 788023.

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 320887 - 2⁷ = 320759 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 (320867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22914 + ... + 22927.

It is an arithmetic number, because the mean of its divisors is an integer number (91684).

2³²⁰⁸⁸⁷ is an apocalyptic number.

320887 is a deficient number, since it is larger than the sum of its proper divisors (45849).

320887 is an equidigital number, since it uses as much as digits as its factorization.

320887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45848.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 320887 is about 566.4688870538. The cubic root of 320887 is about 68.4621774257.

The spelling of 320887 in words is "three hundred twenty thousand, eight hundred eighty-seven".