9509681 has 8 divisors (see below), whose sum is σ = 10168704. Its totient is φ = 8861760.

The previous prime is 9509677. The next prime is 9509693. The reversal of 9509681 is 1869059.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9509681 - 2² = 9509677 is a prime.

It is a super-2 number, since 2×9509681² = 180868065443522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9509611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 965 + ... + 4466.

It is an arithmetic number, because the mean of its divisors is an integer number (1271088).

Almost surely, 2^9509681 is an apocalyptic number.

It is an amenable number.

9509681 is a deficient number, since it is larger than the sum of its proper divisors (659023).

9509681 is a wasteful number, since it uses less digits than its factorization.

9509681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5551.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 9509681 is about 3083.7770671694. Note that the first 3 decimals coincide. The cubic root of 9509681 is about 211.8630969085.

The spelling of 9509681 in words is "nine million, five hundred nine thousand, six hundred eighty-one".