9090561 has 8 divisors (see below), whose sum is σ = 12416544. Its totient is φ = 5912480.

The previous prime is 9090551. The next prime is 9090583. The reversal of 9090561 is 1650909.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9090561 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (9090551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36831 + ... + 37076.

It is an arithmetic number, because the mean of its divisors is an integer number (1552068).

Almost surely, 2^9090561 is an apocalyptic number.

It is an amenable number.

9090561 is a deficient number, since it is larger than the sum of its proper divisors (3325983).

9090561 is a wasteful number, since it uses less digits than its factorization.

9090561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73951.

The product of its (nonzero) digits is 2430, while the sum is 30.

The square root of 9090561 is about 3015.0557208781. The cubic root of 9090561 is about 208.7037384189.

The spelling of 9090561 in words is "nine million, ninety thousand, five hundred sixty-one".