2403663 has 8 divisors (see below), whose sum is σ = 3212976. Its totient is φ = 1598400.

The previous prime is 2403659. The next prime is 2403673. The reversal of 2403663 is 3663042.

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

It is not a de Polignac number, because 2403663 - 2² = 2403659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403673) 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, 883 + ... + 2363.

It is an arithmetic number, because the mean of its divisors is an integer number (401622).

2^2403663 is an apocalyptic number.

2403663 is a deficient number, since it is larger than the sum of its proper divisors (809313).

2403663 is a wasteful number, since it uses less digits than its factorization.

2403663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2025.

The product of its (nonzero) digits is 2592, while the sum is 24.

The square root of 2403663 is about 1550.3751158994. The cubic root of 2403663 is about 133.9546701951.

The spelling of 2403663 in words is "two million, four hundred three thousand, six hundred sixty-three".