5631999 has 8 divisors (see below), whose sum is σ = 7904640. Its totient is φ = 3557016.

The previous prime is 5631991. The next prime is 5632001. The reversal of 5631999 is 9991365.

5631999 is nontrivially palindromic in base 6.

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

It is not a de Polignac number, because 5631999 - 2³ = 5631991 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 5631999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5631991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49347 + ... + 49460.

It is an arithmetic number, because the mean of its divisors is an integer number (988080).

Almost surely, 2^5631999 is an apocalyptic number.

5631999 is a deficient number, since it is larger than the sum of its proper divisors (2272641).

5631999 is a wasteful number, since it uses less digits than its factorization.

5631999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98829.

The product of its digits is 65610, while the sum is 42.

The square root of 5631999 is about 2373.1833051831. The cubic root of 5631999 is about 177.9183967153.

The spelling of 5631999 in words is "five million, six hundred thirty-one thousand, nine hundred ninety-nine".