9868621 has 4 divisors (see below), whose sum is σ = 11278432. Its totient is φ = 8458812.

The previous prime is 9868597. The next prime is 9868643. The reversal of 9868621 is 1268689.

9868621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1268689 = 283 ⋅4483.

It is a cyclic number.

It is not a de Polignac number, because 9868621 - 2¹¹ = 9866573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9868021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 704895 + ... + 704908.

It is an arithmetic number, because the mean of its divisors is an integer number (2819608).

Almost surely, 2^9868621 is an apocalyptic number.

It is an amenable number.

9868621 is a deficient number, since it is larger than the sum of its proper divisors (1409811).

9868621 is a wasteful number, since it uses less digits than its factorization.

9868621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409810.

The product of its digits is 41472, while the sum is 40.

The square root of 9868621 is about 3141.4361365465. The cubic root of 9868621 is about 214.4958151624.

The spelling of 9868621 in words is "nine million, eight hundred sixty-eight thousand, six hundred twenty-one".