987444313 has 2 divisors, whose sum is σ = 987444314. Its totient is φ = 987444312.

The previous prime is 987444301. The next prime is 987444331. The reversal of 987444313 is 313444789.

Together with next prime (987444331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 561310864 + 426133449 = 23692^2 + 20643^2 .

It is a cyclic number.

It is not a de Polignac number, because 987444313 - 2²⁹ = 450573401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987444313.

It is not a weakly prime, because it can be changed into another prime (987444413) 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, 493722156 + 493722157.

It is an arithmetic number, because the mean of its divisors is an integer number (493722157).

Almost surely, 2^987444313 is an apocalyptic number.

It is an amenable number.

987444313 is a deficient number, since it is larger than the sum of its proper divisors (1).

987444313 is an equidigital number, since it uses as much as digits as its factorization.

987444313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 43.

The square root of 987444313 is about 31423.6266684799. The cubic root of 987444313 is about 995.7971316442.

The spelling of 987444313 in words is "nine hundred eighty-seven million, four hundred forty-four thousand, three hundred thirteen".