2381663 has 4 divisors (see below), whose sum is σ = 2384760. Its totient is φ = 2378568.

The previous prime is 2381657. The next prime is 2381677. The reversal of 2381663 is 3661832.

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 a de Polignac number, because none of the positive numbers 2^k-2381663 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 (2381633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593 + ... + 2261.

It is an arithmetic number, because the mean of its divisors is an integer number (596190).

2^2381663 is an apocalyptic number.

2381663 is a deficient number, since it is larger than the sum of its proper divisors (3097).

2381663 is a wasteful number, since it uses less digits than its factorization.

2381663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3096.

The product of its digits is 5184, while the sum is 29.

The square root of 2381663 is about 1543.2637493313. The cubic root of 2381663 is about 133.5447347825.

The spelling of 2381663 in words is "two million, three hundred eighty-one thousand, six hundred sixty-three".