5661013 has 4 divisors (see below), whose sum is σ = 5907168. Its totient is φ = 5414860.

The previous prime is 5661001. The next prime is 5661041. The reversal of 5661013 is 3101665.

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.

It is a cyclic number.

It is not a de Polignac number, because 5661013 - 2¹⁷ = 5529941 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

5661013 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5661083) 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, 123043 + ... + 123088.

It is an arithmetic number, because the mean of its divisors is an integer number (1476792).

Almost surely, 2^5661013 is an apocalyptic number.

It is an amenable number.

5661013 is a deficient number, since it is larger than the sum of its proper divisors (246155).

5661013 is a wasteful number, since it uses less digits than its factorization.

5661013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246154.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 5661013 is about 2379.2883389787. The cubic root of 5661013 is about 178.2233970765.

Adding to 5661013 its reverse (3101665), we get a palindrome (8762678).

The spelling of 5661013 in words is "five million, six hundred sixty-one thousand, thirteen".