561189941 has 8 divisors (see below), whose sum is σ = 639909144. Its totient is φ = 487549440.

The previous prime is 561189913. The next prime is 561189961. The reversal of 561189941 is 149981165.

It can be written as a sum of positive squares in 4 ways, for example, as 212284900 + 348905041 = 14570^2 + 18679^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 561189941 - 2¹⁰ = 561188917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 561189892 and 561189901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561189901) 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 7 ways as a sum of consecutive naturals, for example, 1269440 + ... + 1269881.

It is an arithmetic number, because the mean of its divisors is an integer number (79988643).

Almost surely, 2^561189941 is an apocalyptic number.

It is an amenable number.

561189941 is a deficient number, since it is larger than the sum of its proper divisors (78719203).

561189941 is a wasteful number, since it uses less digits than its factorization.

561189941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2539351.

The product of its digits is 77760, while the sum is 44.

The square root of 561189941 is about 23689.4478829710. The cubic root of 561189941 is about 824.8404667343.

The spelling of 561189941 in words is "five hundred sixty-one million, one hundred eighty-nine thousand, nine hundred forty-one".