5615989 has 6 divisors (see below), whose sum is σ = 5687810. Its totient is φ = 5545056.

The previous prime is 5615977. The next prime is 5616011. The reversal of 5615989 is 9895165.

It is a happy number.

5615989 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 116964 + 5499025 = 342^2 + 2345^2 .

It is not a de Polignac number, because 5615989 - 2⁵ = 5615957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5615969) 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 in 5 ways as a sum of consecutive naturals, for example, 7567 + ... + 8275.

Almost surely, 2^5615989 is an apocalyptic number.

It is an amenable number.

5615989 is a deficient number, since it is larger than the sum of its proper divisors (71821).

5615989 is an frugal number, since it uses more digits than its factorization.

5615989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 798 counting only the distinct ones).

The product of its digits is 97200, while the sum is 43.

The square root of 5615989 is about 2369.8077981136. The cubic root of 5615989 is about 177.7496480522.

The spelling of 5615989 in words is "five million, six hundred fifteen thousand, nine hundred eighty-nine".