9987982 has 8 divisors (see below), whose sum is σ = 15069096. Its totient is φ = 4964952.

The previous prime is 9987979. The next prime is 9988001. The reversal of 9987982 is 2897899.

9987982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

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, 14088 + ... + 14779.

It is an arithmetic number, because the mean of its divisors is an integer number (1883637).

Almost surely, 2^9987982 is an apocalyptic number.

9987982 is a deficient number, since it is larger than the sum of its proper divisors (5081114).

9987982 is a wasteful number, since it uses less digits than its factorization.

9987982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29042.

The product of its digits is 653184, while the sum is 52.

The square root of 9987982 is about 3160.3768762602. The cubic root of 9987982 is about 215.3571277520.

It can be divided in two parts, 998 and 7982, that multiplied together give a triangular number (7966036 = T₃₉₉₁).

The spelling of 9987982 in words is "nine million, nine hundred eighty-seven thousand, nine hundred eighty-two".