9976541987 has 4 divisors (see below), whose sum is σ = 10563397416. Its totient is φ = 9389686560.

The previous prime is 9976541959. The next prime is 9976541989. The reversal of 9976541987 is 7891456799.

9976541987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7891456799 = 8389 ⋅940691.

It is a cyclic number.

It is not a de Polignac number, because 9976541987 - 2²⁸ = 9708106531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9976541989) 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 3 ways as a sum of consecutive naturals, for example, 293427689 + ... + 293427722.

It is an arithmetic number, because the mean of its divisors is an integer number (2640849354).

Almost surely, 2^9976541987 is an apocalyptic number.

9976541987 is a deficient number, since it is larger than the sum of its proper divisors (586855429).

9976541987 is a wasteful number, since it uses less digits than its factorization.

9976541987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586855428.

The product of its digits is 34292160, while the sum is 65.

The square root of 9976541987 is about 99882.6410694071. The cubic root of 9976541987 is about 2152.7487458149.

The spelling of 9976541987 in words is "nine billion, nine hundred seventy-six million, five hundred forty-one thousand, nine hundred eighty-seven".