9986621 has 8 divisors (see below), whose sum is σ = 10268544. Its totient is φ = 9707040.

The previous prime is 9986611. The next prime is 9986651. The reversal of 9986621 is 1266899.

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

It is a cyclic number.

It is not a de Polignac number, because 9986621 - 2¹⁴ = 9970237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11225 + ... + 12081.

It is an arithmetic number, because the mean of its divisors is an integer number (1283568).

Almost surely, 2^9986621 is an apocalyptic number.

It is an amenable number.

9986621 is a deficient number, since it is larger than the sum of its proper divisors (281923).

9986621 is a wasteful number, since it uses less digits than its factorization.

9986621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171.

The product of its digits is 46656, while the sum is 41.

The square root of 9986621 is about 3160.1615465036. The cubic root of 9986621 is about 215.3473455168.

The spelling of 9986621 in words is "nine million, nine hundred eighty-six thousand, six hundred twenty-one".