9935621 has 2 divisors, whose sum is σ = 9935622. Its totient is φ = 9935620.

The previous prime is 9935617. The next prime is 9935641. The reversal of 9935621 is 1265399.

9935621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9150625 + 784996 = 3025^2 + 886^2 .

It is a cyclic number.

It is not a de Polignac number, because 9935621 - 2² = 9935617 is a prime.

It is a super-3 number, since 3×9935621³ (a number of 22 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9935641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4967810 + 4967811.

It is an arithmetic number, because the mean of its divisors is an integer number (4967811).

Almost surely, 2^9935621 is an apocalyptic number.

It is an amenable number.

9935621 is a deficient number, since it is larger than the sum of its proper divisors (1).

9935621 is an equidigital number, since it uses as much as digits as its factorization.

9935621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 35.

The square root of 9935621 is about 3152.0820103544. The cubic root of 9935621 is about 214.9801387819.

The spelling of 9935621 in words is "nine million, nine hundred thirty-five thousand, six hundred twenty-one".