9655921 has 6 divisors (see below), whose sum is σ = 10613666. Its totient is φ = 8778000.

The previous prime is 9655907. The next prime is 9655967. The reversal of 9655921 is 1295569.

9655921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 6969600 + 2686321 = 2640^2 + 1639^2 .

It is not a de Polignac number, because 9655921 - 2⁵ = 9655889 is a prime.

It is a super-3 number, since 3×9655921³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9655901) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39780 + ... + 40021.

Almost surely, 2^9655921 is an apocalyptic number.

It is an amenable number.

9655921 is a deficient number, since it is larger than the sum of its proper divisors (957745).

9655921 is a wasteful number, since it uses less digits than its factorization.

9655921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79823 (or 79812 counting only the distinct ones).

The product of its digits is 24300, while the sum is 37.

The square root of 9655921 is about 3107.3977859296. The cubic root of 9655921 is about 212.9435882556.

It can be divided in two parts, 96559 and 21, that added together give a triangular number (96580 = T₄₃₉).

The spelling of 9655921 in words is "nine million, six hundred fifty-five thousand, nine hundred twenty-one".