5649989 has 4 divisors (see below), whose sum is σ = 5662656. Its totient is φ = 5637324.

The previous prime is 5649977. The next prime is 5649997. The reversal of 5649989 is 9899465.

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 an emirpimes, since its reverse is a distinct semiprime: 9899465 = 5 ⋅1979893.

It is a cyclic number.

It is not a de Polignac number, because 5649989 - 2⁸ = 5649733 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5649949) 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, 5639 + ... + 6564.

It is an arithmetic number, because the mean of its divisors is an integer number (1415664).

Almost surely, 2^5649989 is an apocalyptic number.

It is an amenable number.

5649989 is a deficient number, since it is larger than the sum of its proper divisors (12667).

5649989 is a wasteful number, since it uses less digits than its factorization.

5649989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12666.

The product of its digits is 699840, while the sum is 50.

The square root of 5649989 is about 2376.9705509324. The cubic root of 5649989 is about 178.1076338461.

The spelling of 5649989 in words is "five million, six hundred forty-nine thousand, nine hundred eighty-nine".