5661489 has 8 divisors (see below), whose sum is σ = 7563520. Its totient is φ = 3766896.

The previous prime is 5661457. The next prime is 5661497. The reversal of 5661489 is 9841665.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5661489 - 2⁵ = 5661457 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (5661419) 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 7 ways as a sum of consecutive naturals, for example, 267 + ... + 3375.

It is an arithmetic number, because the mean of its divisors is an integer number (945440).

Almost surely, 2^5661489 is an apocalyptic number.

It is an amenable number.

5661489 is a deficient number, since it is larger than the sum of its proper divisors (1902031).

5661489 is a wasteful number, since it uses less digits than its factorization.

5661489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719.

The product of its digits is 51840, while the sum is 39.

The square root of 5661489 is about 2379.3883667867. The cubic root of 5661489 is about 178.2283921754.

The spelling of 5661489 in words is "five million, six hundred sixty-one thousand, four hundred eighty-nine".