319835381 has 2 divisors, whose sum is σ = 319835382. Its totient is φ = 319835380.

The previous prime is 319835357. The next prime is 319835389. The reversal of 319835381 is 183538913.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295530481 + 24304900 = 17191^2 + 4930^2 .

It is an emirp because it is prime and its reverse (183538913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 319835381 - 2¹⁰ = 319834357 is a prime.

It is a super-2 number, since 2×319835381² = 204589341878830322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (319835389) 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, 159917690 + 159917691.

It is an arithmetic number, because the mean of its divisors is an integer number (159917691).

Almost surely, 2^319835381 is an apocalyptic number.

It is an amenable number.

319835381 is a deficient number, since it is larger than the sum of its proper divisors (1).

319835381 is an equidigital number, since it uses as much as digits as its factorization.

319835381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 41.

The square root of 319835381 is about 17883.9419871571. The cubic root of 319835381 is about 683.8730691647.

The spelling of 319835381 in words is "three hundred nineteen million, eight hundred thirty-five thousand, three hundred eighty-one".