5663999 has 8 divisors (see below), whose sum is σ = 6199248. Its totient is φ = 5132160.

The previous prime is 5663993. The next prime is 5664011. The reversal of 5663999 is 9993665.

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

It is a de Polignac number, because none of the positive numbers 2^k-5663999 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5663993) 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, 3719 + ... + 5015.

It is an arithmetic number, because the mean of its divisors is an integer number (774906).

Almost surely, 2^5663999 is an apocalyptic number.

5663999 is a deficient number, since it is larger than the sum of its proper divisors (535249).

5663999 is a wasteful number, since it uses less digits than its factorization.

5663999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705.

The product of its digits is 393660, while the sum is 47.

The square root of 5663999 is about 2379.9157548115. The cubic root of 5663999 is about 178.2547272479.

The spelling of 5663999 in words is "five million, six hundred sixty-three thousand, nine hundred ninety-nine".