2305623 has 4 divisors (see below), whose sum is σ = 3074168. Its totient is φ = 1537080.

The previous prime is 2305621. The next prime is 2305627. The reversal of 2305623 is 3265032.

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

It is not a de Polignac number, because 2305623 - 2¹ = 2305621 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2305623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2305621) 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, 384268 + ... + 384273.

It is an arithmetic number, because the mean of its divisors is an integer number (768542).

2^2305623 is an apocalyptic number.

2305623 is a deficient number, since it is larger than the sum of its proper divisors (768545).

2305623 is an equidigital number, since it uses as much as digits as its factorization.

2305623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768544.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 2305623 is about 1518.4278053302. The cubic root of 2305623 is about 132.1080955696.

The spelling of 2305623 in words is "two million, three hundred five thousand, six hundred twenty-three".