8981687349 has 20 divisors (see below), whose sum is σ = 13600893196. Its totient is φ = 5905763136.

The previous prime is 8981687329. The next prime is 8981687371. The reversal of 8981687349 is 9437861898.

8981687349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2914056324 + 6067631025 = 53982^2 + 77895^2 .

It is not a de Polignac number, because 8981687349 - 2⁹ = 8981686837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8981687329) 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 in 19 ways as a sum of consecutive naturals, for example, 753574 + ... + 765399.

Almost surely, 2^8981687349 is an apocalyptic number.

It is an amenable number.

8981687349 is a deficient number, since it is larger than the sum of its proper divisors (4619205847).

8981687349 is a wasteful number, since it uses less digits than its factorization.

8981687349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519058 (or 1519049 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The square root of 8981687349 is about 94771.7645134879. The cubic root of 8981687349 is about 2078.6720558666.

The spelling of 8981687349 in words is "eight billion, nine hundred eighty-one million, six hundred eighty-seven thousand, three hundred forty-nine".