5639549 has 2 divisors, whose sum is σ = 5639550. Its totient is φ = 5639548.

The previous prime is 5639533. The next prime is 5639567. The reversal of 5639549 is 9459365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5555449 + 84100 = 2357^2 + 290^2 .

It is a cyclic number.

It is not a de Polignac number, because 5639549 - 2⁴ = 5639533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5639749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2819774 + 2819775.

It is an arithmetic number, because the mean of its divisors is an integer number (2819775).

Almost surely, 2^5639549 is an apocalyptic number.

It is an amenable number.

5639549 is a deficient number, since it is larger than the sum of its proper divisors (1).

5639549 is an equidigital number, since it uses as much as digits as its factorization.

5639549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 41.

The square root of 5639549 is about 2374.7734628802. The cubic root of 5639549 is about 177.9978643013.

The spelling of 5639549 in words is "five million, six hundred thirty-nine thousand, five hundred forty-nine".