9089561 has 4 divisors (see below), whose sum is σ = 9788772. Its totient is φ = 8390352.

The previous prime is 9089551. The next prime is 9089567. The reversal of 9089561 is 1659809.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1907161 + 7182400 = 1381^2 + 2680^2 .

It is a cyclic number.

It is not a de Polignac number, because 9089561 - 2⁶ = 9089497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9089567) 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, 349586 + ... + 349611.

It is an arithmetic number, because the mean of its divisors is an integer number (2447193).

Almost surely, 2^9089561 is an apocalyptic number.

It is an amenable number.

9089561 is a deficient number, since it is larger than the sum of its proper divisors (699211).

9089561 is a wasteful number, since it uses less digits than its factorization.

9089561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699210.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 9089561 is about 3014.8898819028. The cubic root of 9089561 is about 208.6960853749.

The spelling of 9089561 in words is "nine million, eighty-nine thousand, five hundred sixty-one".