9581961 has 8 divisors (see below), whose sum is σ = 13331520. Its totient is φ = 6110192.

The previous prime is 9581939. The next prime is 9581963. The reversal of 9581961 is 1691859.

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

It is a cyclic number.

It is not a de Polignac number, because 9581961 - 2¹⁰ = 9580937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9581963) 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, 69366 + ... + 69503.

It is an arithmetic number, because the mean of its divisors is an integer number (1666440).

Almost surely, 2^9581961 is an apocalyptic number.

It is an amenable number.

9581961 is a deficient number, since it is larger than the sum of its proper divisors (3749559).

9581961 is a wasteful number, since it uses less digits than its factorization.

9581961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138895.

The product of its digits is 19440, while the sum is 39.

The square root of 9581961 is about 3095.4742770697. The cubic root of 9581961 is about 212.3985102445.

The spelling of 9581961 in words is "nine million, five hundred eighty-one thousand, nine hundred sixty-one".