5639731 has 4 divisors (see below), whose sum is σ = 5711200. Its totient is φ = 5568264.

The previous prime is 5639729. The next prime is 5639741. The reversal of 5639731 is 1379365.

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 5639731 - 2¹ = 5639729 is a prime.

It is a super-2 number, since 2×5639731² = 63613131504722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5639741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35616 + ... + 35773.

It is an arithmetic number, because the mean of its divisors is an integer number (1427800).

Almost surely, 2^5639731 is an apocalyptic number.

5639731 is a deficient number, since it is larger than the sum of its proper divisors (71469).

5639731 is an equidigital number, since it uses as much as digits as its factorization.

5639731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71468.

The product of its digits is 17010, while the sum is 34.

The square root of 5639731 is about 2374.8117820156. The cubic root of 5639731 is about 177.9997790680. Note that the first 3 decimals are identical.

The spelling of 5639731 in words is "five million, six hundred thirty-nine thousand, seven hundred thirty-one".