987811513 has 8 divisors (see below), whose sum is σ = 1070169408. Its totient is φ = 906363984.

The previous prime is 987811507. The next prime is 987811541. The reversal of 987811513 is 315118789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 987811513 - 2¹³ = 987803321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 987811513.

It is not an unprimeable number, because it can be changed into a prime (987811553) 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 7 ways as a sum of consecutive naturals, for example, 225331 + ... + 229672.

It is an arithmetic number, because the mean of its divisors is an integer number (133771176).

Almost surely, 2^987811513 is an apocalyptic number.

It is an amenable number.

987811513 is a deficient number, since it is larger than the sum of its proper divisors (82357895).

987811513 is a wasteful number, since it uses less digits than its factorization.

987811513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455183.

The product of its digits is 60480, while the sum is 43.

The square root of 987811513 is about 31429.4688628364. The cubic root of 987811513 is about 995.9205517317.

The spelling of 987811513 in words is "nine hundred eighty-seven million, eight hundred eleven thousand, five hundred thirteen".