319120643 has 2 divisors, whose sum is σ = 319120644. Its totient is φ = 319120642.

The previous prime is 319120639. The next prime is 319120661. The reversal of 319120643 is 346021913.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 319120643 - 2² = 319120639 is a prime.

It is a Chen prime.

It is equal to p_17230286 and since 319120643 and 17230286 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (319120943) 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, 159560321 + 159560322.

It is an arithmetic number, because the mean of its divisors is an integer number (159560322).

Almost surely, 2^319120643 is an apocalyptic number.

319120643 is a deficient number, since it is larger than the sum of its proper divisors (1).

319120643 is an equidigital number, since it uses as much as digits as its factorization.

319120643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 319120643 is about 17863.9481358405. The cubic root of 319120643 is about 683.3632708412.

The spelling of 319120643 in words is "three hundred nineteen million, one hundred twenty thousand, six hundred forty-three".