308489 has 2 divisors, whose sum is σ = 308490. Its totient is φ = 308488.

The previous prime is 308467. The next prime is 308491. The reversal of 308489 is 984803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265225 + 43264 = 515^2 + 208^2 .

It is a cyclic number.

It is not a de Polignac number, because 308489 - 2¹² = 304393 is a prime.

Together with 308491, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (308989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154244 + 154245.

It is an arithmetic number, because the mean of its divisors is an integer number (154245).

2³⁰⁸⁴⁸⁹ is an apocalyptic number.

It is an amenable number.

308489 is a deficient number, since it is larger than the sum of its proper divisors (1).

308489 is an equidigital number, since it uses as much as digits as its factorization.

308489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 308489 is about 555.4178607139. The cubic root of 308489 is about 67.5688552072.

It can be divided in two parts, 308 and 489, that added together give a palindrome (797).

The spelling of 308489 in words is "three hundred eight thousand, four hundred eighty-nine".