9880621 has 12 divisors (see below), whose sum is σ = 10609920. Its totient is φ = 9199040.

The previous prime is 9880603. The next prime is 9880643. The reversal of 9880621 is 1260889.

It is a de Polignac number, because none of the positive numbers 2^k-9880621 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 (9880601) 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 11 ways as a sum of consecutive naturals, for example, 51636 + ... + 51826.

It is an arithmetic number, because the mean of its divisors is an integer number (884160).

Almost surely, 2^9880621 is an apocalyptic number.

It is an amenable number.

9880621 is a deficient number, since it is larger than the sum of its proper divisors (729299).

9880621 is a wasteful number, since it uses less digits than its factorization.

9880621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404 (or 387 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 9880621 is about 3143.3455107576. The cubic root of 9880621 is about 214.5827204892.

It can be divided in two parts, 9880 and 621, that added together give a palindrome (10501).

The spelling of 9880621 in words is "nine million, eight hundred eighty thousand, six hundred twenty-one".