319448189 has 2 divisors, whose sum is σ = 319448190. Its totient is φ = 319448188.

The previous prime is 319448147. The next prime is 319448249. The reversal of 319448189 is 981844913.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214036900 + 105411289 = 14630^2 + 10267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319448189 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319448089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159724094 + 159724095.

It is an arithmetic number, because the mean of its divisors is an integer number (159724095).

Almost surely, 2^319448189 is an apocalyptic number.

It is an amenable number.

319448189 is a deficient number, since it is larger than the sum of its proper divisors (1).

319448189 is an equidigital number, since it uses as much as digits as its factorization.

319448189 is an evil number, because the sum of its binary digits is even.

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

The square root of 319448189 is about 17873.1135787808. The cubic root of 319448189 is about 683.5969926573.

The spelling of 319448189 in words is "three hundred nineteen million, four hundred forty-eight thousand, one hundred eighty-nine".