9968621 has 4 divisors (see below), whose sum is σ = 10735452. Its totient is φ = 9201792.

The previous prime is 9968587. The next prime is 9968627. The reversal of 9968621 is 1268699.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4141225 + 5827396 = 2035^2 + 2414^2 .

It is a cyclic number.

It is not a de Polignac number, because 9968621 - 2¹⁰ = 9967597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9968627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 383396 + ... + 383421.

It is an arithmetic number, because the mean of its divisors is an integer number (2683863).

Almost surely, 2^9968621 is an apocalyptic number.

It is an amenable number.

9968621 is a deficient number, since it is larger than the sum of its proper divisors (766831).

9968621 is a wasteful number, since it uses less digits than its factorization.

9968621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766830.

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

The square root of 9968621 is about 3157.3123063771. The cubic root of 9968621 is about 215.2178861992.

The spelling of 9968621 in words is "nine million, nine hundred sixty-eight thousand, six hundred twenty-one".