987995975993 has 8 divisors (see below), whose sum is σ = 1064003430336. Its totient is φ = 911989630800.

The previous prime is 987995975969. The next prime is 987995976053. The reversal of 987995975993 is 399579599789.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-987995975993 is a prime.

It is a super-2 number, since 2×987995975993² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 987995975899 and 987995975908.

It is not an unprimeable number, because it can be changed into a prime (987995975903) 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, 3064388 + ... + 3371418.

It is an arithmetic number, because the mean of its divisors is an integer number (133000428792).

Almost surely, 2^987995975993 is an apocalyptic number.

It is an amenable number.

987995975993 is a deficient number, since it is larger than the sum of its proper divisors (76007454343).

987995975993 is a wasteful number, since it uses less digits than its factorization.

987995975993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554575.

The product of its digits is 15624365400, while the sum is 89.

The spelling of 987995975993 in words is "nine hundred eighty-seven billion, nine hundred ninety-five million, nine hundred seventy-five thousand, nine hundred ninety-three".