9655681 has 4 divisors (see below), whose sum is σ = 11035072. Its totient is φ = 8276292.

The previous prime is 9655673. The next prime is 9655687. The reversal of 9655681 is 1865569.

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.

It is a cyclic number.

It is not a de Polignac number, because 9655681 - 2³ = 9655673 is a prime.

It is a super-2 number, since 2×9655681² = 186464351147522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9655687) 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, 689685 + ... + 689698.

It is an arithmetic number, because the mean of its divisors is an integer number (2758768).

Almost surely, 2^9655681 is an apocalyptic number.

It is an amenable number.

9655681 is a deficient number, since it is larger than the sum of its proper divisors (1379391).

9655681 is a wasteful number, since it uses less digits than its factorization.

9655681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379390.

The product of its digits is 64800, while the sum is 40.

The square root of 9655681 is about 3107.3591681684. The cubic root of 9655681 is about 212.9418239880.

It can be divided in two parts, 965568 and 1, that added together give a palindrome (965569).

The spelling of 9655681 in words is "nine million, six hundred fifty-five thousand, six hundred eighty-one".