987878741 has 2 divisors, whose sum is σ = 987878742. Its totient is φ = 987878740.

The previous prime is 987878737. The next prime is 987878779. The reversal of 987878741 is 147878789.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 898500625 + 89378116 = 29975^2 + 9454^2 .

It is an emirp because it is prime and its reverse (147878789) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 987878741 - 2² = 987878737 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (987878701) 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, 493939370 + 493939371.

It is an arithmetic number, because the mean of its divisors is an integer number (493939371).

Almost surely, 2^987878741 is an apocalyptic number.

It is an amenable number.

987878741 is a deficient number, since it is larger than the sum of its proper divisors (1).

987878741 is an equidigital number, since it uses as much as digits as its factorization.

987878741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6322176, while the sum is 59.

The square root of 987878741 is about 31430.5383504642. The cubic root of 987878741 is about 995.9431445129.

The spelling of 987878741 in words is "nine hundred eighty-seven million, eight hundred seventy-eight thousand, seven hundred forty-one".