9986951 has 8 divisors (see below), whose sum is σ = 11321520. Its totient is φ = 8733312.

The previous prime is 9986941. The next prime is 9986987. The reversal of 9986951 is 1596899.

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

It is not a de Polignac number, because 9986951 - 2¹⁴ = 9970567 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9986896 and 9986905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9986941) 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, 19970 + ... + 20463.

It is an arithmetic number, because the mean of its divisors is an integer number (1415190).

Almost surely, 2^9986951 is an apocalyptic number.

9986951 is a deficient number, since it is larger than the sum of its proper divisors (1334569).

9986951 is a wasteful number, since it uses less digits than its factorization.

9986951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40465.

The product of its digits is 174960, while the sum is 47.

The square root of 9986951 is about 3160.2137585929. The cubic root of 9986951 is about 215.3497174850.

The spelling of 9986951 in words is "nine million, nine hundred eighty-six thousand, nine hundred fifty-one".