319637489 has 2 divisors, whose sum is σ = 319637490. Its totient is φ = 319637488.

The previous prime is 319637473. The next prime is 319637543. The reversal of 319637489 is 984736913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 313006864 + 6630625 = 17692^2 + 2575^2 .

It is an emirp because it is prime and its reverse (984736913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 319637489 - 2⁴ = 319637473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (319637419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159818744 + 159818745.

It is an arithmetic number, because the mean of its divisors is an integer number (159818745).

Almost surely, 2^319637489 is an apocalyptic number.

It is an amenable number.

319637489 is a deficient number, since it is larger than the sum of its proper divisors (1).

319637489 is an equidigital number, since it uses as much as digits as its factorization.

319637489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 979776, while the sum is 50.

The square root of 319637489 is about 17878.4084582493. The cubic root of 319637489 is about 683.7319956223.

The spelling of 319637489 in words is "three hundred nineteen million, six hundred thirty-seven thousand, four hundred eighty-nine".