308089 has 4 divisors (see below), whose sum is σ = 313956. Its totient is φ = 302224.

The previous prime is 308081. The next prime is 308093. The reversal of 308089 is 980803.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 218089 + 90000 = 467^2 + 300^2 .

It is a cyclic number.

It is not a de Polignac number, because 308089 - 2³ = 308081 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 (308081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2854 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (78489).

2³⁰⁸⁰⁸⁹ is an apocalyptic number.

It is an amenable number.

308089 is a deficient number, since it is larger than the sum of its proper divisors (5867).

308089 is an equidigital number, since it uses as much as digits as its factorization.

308089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5866.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 308089 is about 555.0576546630. The cubic root of 308089 is about 67.5396383554.

The spelling of 308089 in words is "three hundred eight thousand, eighty-nine".