308939 has 2 divisors, whose sum is σ = 308940. Its totient is φ = 308938.

The previous prime is 308933. The next prime is 308951. The reversal of 308939 is 939803.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 308939 - 2⁴ = 308923 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (308933) 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 as a sum of consecutive naturals, namely, 154469 + 154470.

It is an arithmetic number, because the mean of its divisors is an integer number (154470).

2³⁰⁸⁹³⁹ is an apocalyptic number.

308939 is a deficient number, since it is larger than the sum of its proper divisors (1).

308939 is an equidigital number, since it uses as much as digits as its factorization.

308939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 308939 is about 555.8228134937. The cubic root of 308939 is about 67.6016939925.

The spelling of 308939 in words is "three hundred eight thousand, nine hundred thirty-nine".