320212987 has 2 divisors, whose sum is σ = 320212988. Its totient is φ = 320212986.

The previous prime is 320212979. The next prime is 320213017. The reversal of 320212987 is 789212023.

It is a weak prime.

It is an emirp because it is prime and its reverse (789212023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 320212987 - 2³ = 320212979 is a prime.

It is not a weakly prime, because it can be changed into another prime (320212957) 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, 160106493 + 160106494.

It is an arithmetic number, because the mean of its divisors is an integer number (160106494).

Almost surely, 2^320212987 is an apocalyptic number.

320212987 is a deficient number, since it is larger than the sum of its proper divisors (1).

320212987 is an equidigital number, since it uses as much as digits as its factorization.

320212987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 320212987 is about 17894.4959973730. The cubic root of 320212987 is about 684.1420961183.

The spelling of 320212987 in words is "three hundred twenty million, two hundred twelve thousand, nine hundred eighty-seven".