123612563 has 4 divisors (see below), whose sum is σ = 123703968. Its totient is φ = 123521160.

The previous prime is 123612551. The next prime is 123612571. The reversal of 123612563 is 365216321.

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 123612563 - 2¹² = 123608467 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123612263) 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, 43643 + ... + 46388.

It is an arithmetic number, because the mean of its divisors is an integer number (30925992).

Almost surely, 2^123612563 is an apocalyptic number.

123612563 is a deficient number, since it is larger than the sum of its proper divisors (91405).

123612563 is an equidigital number, since it uses as much as digits as its factorization.

123612563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91404.

The product of its digits is 6480, while the sum is 29.

The square root of 123612563 is about 11118.1186807841. The cubic root of 123612563 is about 498.1431971016.

Adding to 123612563 its reverse (365216321), we get a palindrome (488828884).

The spelling of 123612563 in words is "one hundred twenty-three million, six hundred twelve thousand, five hundred sixty-three".