90565 has 8 divisors (see below), whose sum is σ = 110880. Its totient is φ = 70992.

The previous prime is 90547. The next prime is 90583. The reversal of 90565 is 56509.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (90547) and next prime (90583).

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

It is a cyclic number.

It is not a de Polignac number, because 90565 - 2⁵ = 90533 is a prime.

It is a super-3 number, since 3×90565³ = 2228447613336375, which contains 333 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142 + ... + 448.

It is an arithmetic number, because the mean of its divisors is an integer number (13860).

2⁹⁰⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

90565 is a deficient number, since it is larger than the sum of its proper divisors (20315).

90565 is a wasteful number, since it uses less digits than its factorization.

90565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 90565 is about 300.9401933940. The cubic root of 90565 is about 44.9076294527.

The spelling of 90565 in words is "ninety thousand, five hundred sixty-five".