5639987 has 8 divisors (see below), whose sum is σ = 5794800. Its totient is φ = 5487264.

The previous prime is 5639983. The next prime is 5639989. The reversal of 5639987 is 7899365.

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

It is a cyclic number.

It is not a de Polignac number, because 5639987 - 2² = 5639983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5639981) 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, 5993 + ... + 6869.

It is an arithmetic number, because the mean of its divisors is an integer number (724350).

Almost surely, 2^5639987 is an apocalyptic number.

5639987 is a deficient number, since it is larger than the sum of its proper divisors (154813).

5639987 is a wasteful number, since it uses less digits than its factorization.

5639987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1045.

The product of its digits is 408240, while the sum is 47.

The square root of 5639987 is about 2374.8656804123. The cubic root of 5639987 is about 178.0024722966.

The spelling of 5639987 in words is "five million, six hundred thirty-nine thousand, nine hundred eighty-seven".