308321089 has 2 divisors, whose sum is σ = 308321090. Its totient is φ = 308321088.

The previous prime is 308321077. The next prime is 308321131. The reversal of 308321089 is 980123803.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202066225 + 106254864 = 14215^2 + 10308^2 .

It is a cyclic number.

It is not a de Polignac number, because 308321089 - 2²¹ = 306223937 is a prime.

It is not a weakly prime, because it can be changed into another prime (308321029) 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, 154160544 + 154160545.

It is an arithmetic number, because the mean of its divisors is an integer number (154160545).

Almost surely, 2^308321089 is an apocalyptic number.

It is an amenable number.

308321089 is a deficient number, since it is larger than the sum of its proper divisors (1).

308321089 is an equidigital number, since it uses as much as digits as its factorization.

308321089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 308321089 is about 17559.0742637532. The cubic root of 308321089 is about 675.5659370770.

The spelling of 308321089 in words is "three hundred eight million, three hundred twenty-one thousand, eighty-nine".