90563 has 4 divisors (see below), whose sum is σ = 98808. Its totient is φ = 82320.

The previous prime is 90547. The next prime is 90583. The reversal of 90563 is 36509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36509 = 11 ⋅3319.

It is a cyclic number.

It is not a de Polignac number, because 90563 - 2⁴ = 90547 is a prime.

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

It is a Duffinian number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (90523) 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, 4106 + ... + 4127.

It is an arithmetic number, because the mean of its divisors is an integer number (24702).

2⁹⁰⁵⁶³ is an apocalyptic number.

90563 is a deficient number, since it is larger than the sum of its proper divisors (8245).

90563 is a wasteful number, since it uses less digits than its factorization.

90563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8244.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 90563 is about 300.9368704562. The cubic root of 90563 is about 44.9072988764.

The spelling of 90563 in words is "ninety thousand, five hundred sixty-three".