9996987 has 32 divisors (see below), whose sum is σ = 17902080. Its totient is φ = 4792320.

The previous prime is 9996979. The next prime is 9996991. The reversal of 9996987 is 7896999.

9996987 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9996987 - 2³ = 9996979 is a prime.

9996987 is strictly pandigital in base 8.

It is not an unprimeable number, because it can be changed into a prime (9996937) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1339 + ... + 4667.

It is an arithmetic number, because the mean of its divisors is an integer number (559440).

Almost surely, 2^9996987 is an apocalyptic number.

9996987 is a deficient number, since it is larger than the sum of its proper divisors (7905093).

9996987 is a wasteful number, since it uses less digits than its factorization.

9996987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363.

The product of its digits is 2204496, while the sum is 57.

The square root of 9996987 is about 3161.8012271489. The cubic root of 9996987 is about 215.4218291239.

The spelling of 9996987 in words is "nine million, nine hundred ninety-six thousand, nine hundred eighty-seven".