320387 has 2 divisors, whose sum is σ = 320388. Its totient is φ = 320386.

The previous prime is 320377. The next prime is 320389. The reversal of 320387 is 783023.

It is a strong prime.

It is an emirp because it is prime and its reverse (783023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320387 - 2¹² = 316291 is a prime.

Together with 320389, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 320387.

It is not a weakly prime, because it can be changed into another prime (320389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160193 + 160194.

It is an arithmetic number, because the mean of its divisors is an integer number (160194).

2³²⁰³⁸⁷ is an apocalyptic number.

320387 is a deficient number, since it is larger than the sum of its proper divisors (1).

320387 is an equidigital number, since it uses as much as digits as its factorization.

320387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 320387 is about 566.0273844965. The cubic root of 320387 is about 68.4266001212.

It can be divided in two parts, 320 and 387, that added together give a palindrome (707).

The spelling of 320387 in words is "three hundred twenty thousand, three hundred eighty-seven".