320869 has 4 divisors (see below), whose sum is σ = 327744. Its totient is φ = 313996.

The previous prime is 320867. The next prime is 320899. The reversal of 320869 is 968023.

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, and also an emirpimes, since its reverse is a distinct semiprime: 968023 = 7 ⋅138289.

It is a cyclic number.

It is not a de Polignac number, because 320869 - 2¹ = 320867 is a prime.

It is a super-2 number, since 2×320869² = 205913830322, which contains 22 as substring.

It is a Duffinian number.

320869 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320861) 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, 3367 + ... + 3460.

It is an arithmetic number, because the mean of its divisors is an integer number (81936).

2³²⁰⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

320869 is a deficient number, since it is larger than the sum of its proper divisors (6875).

320869 is an equidigital number, since it uses as much as digits as its factorization.

320869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6874.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 320869 is about 566.4529989328. The cubic root of 320869 is about 68.4608972842.

The spelling of 320869 in words is "three hundred twenty thousand, eight hundred sixty-nine".