2405663 has 4 divisors (see below), whose sum is σ = 2590728. Its totient is φ = 2220600.

The previous prime is 2405651. The next prime is 2405677. The reversal of 2405663 is 3665042.

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 2405663 - 2¹⁴ = 2389279 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 (2405633) 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, 92513 + ... + 92538.

It is an arithmetic number, because the mean of its divisors is an integer number (647682).

2^2405663 is an apocalyptic number.

2405663 is a deficient number, since it is larger than the sum of its proper divisors (185065).

2405663 is a wasteful number, since it uses less digits than its factorization.

2405663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185064.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2405663 is about 1551.0199869763. The cubic root of 2405663 is about 133.9918128212.

The spelling of 2405663 in words is "two million, four hundred five thousand, six hundred sixty-three".