9561881 has 4 divisors (see below), whose sum is σ = 10927872. Its totient is φ = 8195892.

The previous prime is 9561869. The next prime is 9561901. The reversal of 9561881 is 1881659.

9561881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 9561881 - 2⁶ = 9561817 is a prime.

It is a super-2 number, since 2×9561881² = 182859136516322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9564881) 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, 682985 + ... + 682998.

It is an arithmetic number, because the mean of its divisors is an integer number (2731968).

Almost surely, 2^9561881 is an apocalyptic number.

It is an amenable number.

9561881 is a deficient number, since it is larger than the sum of its proper divisors (1365991).

9561881 is a wasteful number, since it uses less digits than its factorization.

9561881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1365990.

The product of its digits is 17280, while the sum is 38.

The square root of 9561881 is about 3092.2291312256. The cubic root of 9561881 is about 212.2500387301.

The spelling of 9561881 in words is "nine million, five hundred sixty-one thousand, eight hundred eighty-one".