319750139 has 2 divisors, whose sum is σ = 319750140. Its totient is φ = 319750138.

The previous prime is 319750129. The next prime is 319750153. The reversal of 319750139 is 931057913.

It is a weak prime.

It is an emirp because it is prime and its reverse (931057913) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-319750139 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (319750129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159875069 + 159875070.

It is an arithmetic number, because the mean of its divisors is an integer number (159875070).

Almost surely, 2^319750139 is an apocalyptic number.

319750139 is a deficient number, since it is larger than the sum of its proper divisors (1).

319750139 is an equidigital number, since it uses as much as digits as its factorization.

319750139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25515, while the sum is 38.

The square root of 319750139 is about 17881.5586289339. The cubic root of 319750139 is about 683.8123088577.

The spelling of 319750139 in words is "three hundred nineteen million, seven hundred fifty thousand, one hundred thirty-nine".