308234989 has 2 divisors, whose sum is σ = 308234990. Its totient is φ = 308234988.

The previous prime is 308234933. The next prime is 308235017. The reversal of 308234989 is 989432803.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 291897225 + 16337764 = 17085^2 + 4042^2 .

It is an emirp because it is prime and its reverse (989432803) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 308234989 - 2¹¹ = 308232941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (308234189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154117494 + 154117495.

It is an arithmetic number, because the mean of its divisors is an integer number (154117495).

Almost surely, 2^308234989 is an apocalyptic number.

It is an amenable number.

308234989 is a deficient number, since it is larger than the sum of its proper divisors (1).

308234989 is an equidigital number, since it uses as much as digits as its factorization.

308234989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 46.

The square root of 308234989 is about 17556.6223687815. The cubic root of 308234989 is about 675.5030463174.

The spelling of 308234989 in words is "three hundred eight million, two hundred thirty-four thousand, nine hundred eighty-nine".