5639999 has 4 divisors (see below), whose sum is σ = 5732520. Its totient is φ = 5547480.

The previous prime is 5639989. The next prime is 5640031. The reversal of 5639999 is 9999365.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5639999 - 2⁴ = 5639983 is a prime.

It is a Duffinian number.

5639999 is a modest number, since divided by 9999 gives 563 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5639929) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46169 + ... + 46290.

It is an arithmetic number, because the mean of its divisors is an integer number (1433130).

Almost surely, 2^5639999 is an apocalyptic number.

5639999 is a deficient number, since it is larger than the sum of its proper divisors (92521).

5639999 is an equidigital number, since it uses as much as digits as its factorization.

5639999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92520.

The product of its digits is 590490, while the sum is 50.

The square root of 5639999 is about 2374.8682068696. The cubic root of 5639999 is about 178.0025985397.

The spelling of 5639999 in words is "five million, six hundred thirty-nine thousand, nine hundred ninety-nine".