2305663 has 4 divisors (see below), whose sum is σ = 2308768. Its totient is φ = 2302560.

The previous prime is 2305651. The next prime is 2305691. The reversal of 2305663 is 3665032.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2305663 - 2¹⁷ = 2174591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2305613) 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, 295 + ... + 2167.

It is an arithmetic number, because the mean of its divisors is an integer number (577192).

2^2305663 is an apocalyptic number.

2305663 is a deficient number, since it is larger than the sum of its proper divisors (3105).

2305663 is a wasteful number, since it uses less digits than its factorization.

2305663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3104.

The product of its (nonzero) digits is 3240, while the sum is 25.

The square root of 2305663 is about 1518.4409767917. The cubic root of 2305663 is about 132.1088595415.

The spelling of 2305663 in words is "two million, three hundred five thousand, six hundred sixty-three".