9561649 has 4 divisors (see below), whose sum is σ = 9577764. Its totient is φ = 9545536.

The previous prime is 9561647. The next prime is 9561653. The reversal of 9561649 is 9461659.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9461659 = 2551 ⋅3709.

It can be written as a sum of positive squares in 2 ways, for example, as 4752400 + 4809249 = 2180^2 + 2193^2 .

It is a cyclic number.

It is not a de Polignac number, because 9561649 - 2¹ = 9561647 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9561647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7132 + ... + 8365.

It is an arithmetic number, because the mean of its divisors is an integer number (2394441).

Almost surely, 2^9561649 is an apocalyptic number.

It is an amenable number.

9561649 is a deficient number, since it is larger than the sum of its proper divisors (16115).

9561649 is a wasteful number, since it uses less digits than its factorization.

9561649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16114.

The product of its digits is 58320, while the sum is 40.

The square root of 9561649 is about 3092.1916176072. The cubic root of 9561649 is about 212.2483221080.

The spelling of 9561649 in words is "nine million, five hundred sixty-one thousand, six hundred forty-nine".