320789 has 4 divisors (see below), whose sum is σ = 366624. Its totient is φ = 274956.

The previous prime is 320767. The next prime is 320791. The reversal of 320789 is 987023.

320789 = T₁₀₂ + T₁₀₃ + ... + T₁₄₃.

320789 = 326² + 327² + 328².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320789 - 2⁸ = 320533 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320759) 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, 22907 + ... + 22920.

It is an arithmetic number, because the mean of its divisors is an integer number (91656).

2³²⁰⁷⁸⁹ is an apocalyptic number.

It is an amenable number.

320789 is a deficient number, since it is larger than the sum of its proper divisors (45835).

320789 is an equidigital number, since it uses as much as digits as its factorization.

320789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45834.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 320789 is about 566.3823796694. The cubic root of 320789 is about 68.4552071874.

The spelling of 320789 in words is "three hundred twenty thousand, seven hundred eighty-nine".