319288561987 has 2 divisors, whose sum is σ = 319288561988. Its totient is φ = 319288561986.

The previous prime is 319288561951. The next prime is 319288561997. The reversal of 319288561987 is 789165882913.

It is a strong prime.

It is an emirp because it is prime and its reverse (789165882913) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 319288561987 - 2³¹ = 317141078339 is a prime.

It is not a weakly prime, because it can be changed into another prime (319288561997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159644280993 + 159644280994.

It is an arithmetic number, because the mean of its divisors is an integer number (159644280994).

Almost surely, 2^319288561987 is an apocalyptic number.

319288561987 is a deficient number, since it is larger than the sum of its proper divisors (1).

319288561987 is an equidigital number, since it uses as much as digits as its factorization.

319288561987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52254720, while the sum is 67.

The spelling of 319288561987 in words is "three hundred nineteen billion, two hundred eighty-eight million, five hundred sixty-one thousand, nine hundred eighty-seven".