5661889 has 4 divisors (see below), whose sum is σ = 5677056. Its totient is φ = 5646724.

The previous prime is 5661839. The next prime is 5661893. The reversal of 5661889 is 9881665.

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: 9881665 = 5 ⋅1976333.

It is a cyclic number.

It is not a de Polignac number, because 5661889 - 2¹⁵ = 5629121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5661839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7009 + ... + 7774.

It is an arithmetic number, because the mean of its divisors is an integer number (1419264).

Almost surely, 2^5661889 is an apocalyptic number.

It is an amenable number.

5661889 is a deficient number, since it is larger than the sum of its proper divisors (15167).

5661889 is a wasteful number, since it uses less digits than its factorization.

5661889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166.

The product of its digits is 103680, while the sum is 43.

The square root of 5661889 is about 2379.4724205168. The cubic root of 5661889 is about 178.2325895210.

The spelling of 5661889 in words is "five million, six hundred sixty-one thousand, eight hundred eighty-nine".