9623561 has 4 divisors (see below), whose sum is σ = 9858324. Its totient is φ = 9388800.

The previous prime is 9623533. The next prime is 9623567. The reversal of 9623561 is 1653269.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1653269 = 101 ⋅16369.

It can be written as a sum of positive squares in 2 ways, for example, as 3171961 + 6451600 = 1781^2 + 2540^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9623561 is a prime.

It is a super-2 number, since 2×9623561² = 185225852641442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9623567) 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, 117320 + ... + 117401.

It is an arithmetic number, because the mean of its divisors is an integer number (2464581).

Almost surely, 2^9623561 is an apocalyptic number.

It is an amenable number.

9623561 is a deficient number, since it is larger than the sum of its proper divisors (234763).

9623561 is a wasteful number, since it uses less digits than its factorization.

9623561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234762.

The product of its digits is 9720, while the sum is 32.

The square root of 9623561 is about 3102.1864869798. The cubic root of 9623561 is about 212.7054419175.

The spelling of 9623561 in words is "nine million, six hundred twenty-three thousand, five hundred sixty-one".