5639849 has 4 divisors (see below), whose sum is σ = 5645136. Its totient is φ = 5634564.

The previous prime is 5639839. The next prime is 5639857. The reversal of 5639849 is 9489365.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 5639849 - 2⁸ = 5639593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5639839) 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, 419 + ... + 3384.

It is an arithmetic number, because the mean of its divisors is an integer number (1411284).

Almost surely, 2^5639849 is an apocalyptic number.

It is an amenable number.

5639849 is a deficient number, since it is larger than the sum of its proper divisors (5287).

5639849 is a wasteful number, since it uses less digits than its factorization.

5639849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5286.

The product of its digits is 233280, while the sum is 44.

The square root of 5639849 is about 2374.8366259598. The cubic root of 5639849 is about 178.0010204882.

The spelling of 5639849 in words is "five million, six hundred thirty-nine thousand, eight hundred forty-nine".