308849 has 2 divisors, whose sum is σ = 308850. Its totient is φ = 308848.

The previous prime is 308827. The next prime is 308851. The reversal of 308849 is 948803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 255025 + 53824 = 505^2 + 232^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-308849 is a prime.

It is a Sophie Germain prime.

Together with 308851, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 308849.

It is not a weakly prime, because it can be changed into another prime (308809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154424 + 154425.

It is an arithmetic number, because the mean of its divisors is an integer number (154425).

2³⁰⁸⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

308849 is a deficient number, since it is larger than the sum of its proper divisors (1).

308849 is an equidigital number, since it uses as much as digits as its factorization.

308849 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 308849 is about 555.7418465439. The cubic root of 308849 is about 67.5951287878.

The spelling of 308849 in words is "three hundred eight thousand, eight hundred forty-nine".