2403563 has 8 divisors (see below), whose sum is σ = 2469600. Its totient is φ = 2338560.

The previous prime is 2403553. The next prime is 2403581. The reversal of 2403563 is 3653042.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2403563 - 2⁴ = 2403547 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 4³ + 0 + 3⁹ + 5⁹ + 6⁷ + 3⁹ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2403553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6713 + ... + 7061.

It is an arithmetic number, because the mean of its divisors is an integer number (308700).

2^2403563 is an apocalyptic number.

2403563 is a deficient number, since it is larger than the sum of its proper divisors (66037).

2403563 is an equidigital number, since it uses as much as digits as its factorization.

2403563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 2403563 is about 1550.3428653043. The cubic root of 2403563 is about 133.9528125230.

The spelling of 2403563 in words is "two million, four hundred three thousand, five hundred sixty-three".