319481489 has 2 divisors, whose sum is σ = 319481490. Its totient is φ = 319481488.

The previous prime is 319481441. The next prime is 319481497. The reversal of 319481489 is 984184913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 303038464 + 16443025 = 17408^2 + 4055^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319481489 is a prime.

It is not a weakly prime, because it can be changed into another prime (319481089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159740744 + 159740745.

It is an arithmetic number, because the mean of its divisors is an integer number (159740745).

Almost surely, 2^319481489 is an apocalyptic number.

It is an amenable number.

319481489 is a deficient number, since it is larger than the sum of its proper divisors (1).

319481489 is an equidigital number, since it uses as much as digits as its factorization.

319481489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The square root of 319481489 is about 17874.0451213484. The cubic root of 319481489 is about 683.6207450630.

The spelling of 319481489 in words is "three hundred nineteen million, four hundred eighty-one thousand, four hundred eighty-nine".