123285563 has 4 divisors (see below), whose sum is σ = 123340440. Its totient is φ = 123230688.

The previous prime is 123285557. The next prime is 123285577. The reversal of 123285563 is 365582321.

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

It is a cyclic number.

It is not a de Polignac number, because 123285563 - 2⁸ = 123285307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123285523) 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, 23918 + ... + 28611.

It is an arithmetic number, because the mean of its divisors is an integer number (30835110).

Almost surely, 2^123285563 is an apocalyptic number.

123285563 is a deficient number, since it is larger than the sum of its proper divisors (54877).

123285563 is an equidigital number, since it uses as much as digits as its factorization.

123285563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54876.

The product of its digits is 43200, while the sum is 35.

The square root of 123285563 is about 11103.4032170322. The cubic root of 123285563 is about 497.7035528082.

The spelling of 123285563 in words is "one hundred twenty-three million, two hundred eighty-five thousand, five hundred sixty-three".