9565981 has 4 divisors (see below), whose sum is σ = 9624832. Its totient is φ = 9507132.

The previous prime is 9565979. The next prime is 9565991. The reversal of 9565981 is 1895659.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1895659 = 653 ⋅2903.

It is a cyclic number.

It is not a de Polignac number, because 9565981 - 2¹ = 9565979 is a prime.

It is a super-2 number, since 2×9565981² = 183015984984722, 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 (9565921) 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, 29181 + ... + 29506.

It is an arithmetic number, because the mean of its divisors is an integer number (2406208).

Almost surely, 2^9565981 is an apocalyptic number.

It is an amenable number.

9565981 is a deficient number, since it is larger than the sum of its proper divisors (58851).

9565981 is a wasteful number, since it uses less digits than its factorization.

9565981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58850.

The product of its digits is 97200, while the sum is 43.

The square root of 9565981 is about 3092.8920123406. The cubic root of 9565981 is about 212.2803710049.

The spelling of 9565981 in words is "nine million, five hundred sixty-five thousand, nine hundred eighty-one".