319398481 has 2 divisors, whose sum is σ = 319398482. Its totient is φ = 319398480.

The previous prime is 319398427. The next prime is 319398491. The reversal of 319398481 is 184893913.

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., 304188481 + 15210000 = 17441^2 + 3900^2 .

It is a cyclic number.

It is not a de Polignac number, because 319398481 - 2¹³ = 319390289 is a prime.

It is a super-2 number, since 2×319398481² = 204030779330214722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (319398491) 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, 159699240 + 159699241.

It is an arithmetic number, because the mean of its divisors is an integer number (159699241).

Almost surely, 2^319398481 is an apocalyptic number.

It is an amenable number.

319398481 is a deficient number, since it is larger than the sum of its proper divisors (1).

319398481 is an equidigital number, since it uses as much as digits as its factorization.

319398481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 319398481 is about 17871.7229443610. The cubic root of 319398481 is about 683.5615335927.

The spelling of 319398481 in words is "three hundred nineteen million, three hundred ninety-eight thousand, four hundred eighty-one".