320839 has 2 divisors, whose sum is σ = 320840. Its totient is φ = 320838.

The previous prime is 320833. The next prime is 320843. The reversal of 320839 is 938023.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (938023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320839 - 2¹⁷ = 189767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160419 + 160420.

It is an arithmetic number, because the mean of its divisors is an integer number (160420).

2³²⁰⁸³⁹ is an apocalyptic number.

320839 is a deficient number, since it is larger than the sum of its proper divisors (1).

320839 is an equidigital number, since it uses as much as digits as its factorization.

320839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 320839 is about 566.4265177408. The cubic root of 320839 is about 68.4587636088.

The spelling of 320839 in words is "three hundred twenty thousand, eight hundred thirty-nine".