90084561 has 8 divisors (see below), whose sum is σ = 137271744. Its totient is φ = 51476880.

The previous prime is 90084539. The next prime is 90084593. The reversal of 90084561 is 16548009.

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

It is not a de Polignac number, because 90084561 - 2⁷ = 90084433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90084361) 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, 2144850 + ... + 2144891.

It is an arithmetic number, because the mean of its divisors is an integer number (17158968).

Almost surely, 2^90084561 is an apocalyptic number.

It is an amenable number.

90084561 is a deficient number, since it is larger than the sum of its proper divisors (47187183).

90084561 is a wasteful number, since it uses less digits than its factorization.

90084561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289751.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 90084561 is about 9491.2886901622. The cubic root of 90084561 is about 448.2807833391.

The spelling of 90084561 in words is "ninety million, eighty-four thousand, five hundred sixty-one".