987891887135 has 4 divisors (see below), whose sum is σ = 1185470264568. Its totient is φ = 790313509704.

The previous prime is 987891887039. The next prime is 987891887149. The reversal of 987891887135 is 531788198789.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 987891887135 - 2⁸ = 987891886879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98789188709 + ... + 98789188718.

It is an arithmetic number, because the mean of its divisors is an integer number (296367566142).

Almost surely, 2^987891887135 is an apocalyptic number.

987891887135 is a deficient number, since it is larger than the sum of its proper divisors (197578377433).

987891887135 is a wasteful number, since it uses less digits than its factorization.

987891887135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197578377432.

The product of its digits is 243855360, while the sum is 74.

The spelling of 987891887135 in words is "nine hundred eighty-seven billion, eight hundred ninety-one million, eight hundred eighty-seven thousand, one hundred thirty-five".