561938117 has 4 divisors (see below), whose sum is σ = 605164140. Its totient is φ = 518712096.

The previous prime is 561938107. The next prime is 561938123. The reversal of 561938117 is 711839165.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 167081476 + 394856641 = 12926^2 + 19871^2 .

It is a cyclic number.

It is not a de Polignac number, because 561938117 - 2¹⁶ = 561872581 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 (561938107) 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, 21612992 + ... + 21613017.

It is an arithmetic number, because the mean of its divisors is an integer number (151291035).

Almost surely, 2^561938117 is an apocalyptic number.

It is an amenable number.

561938117 is a deficient number, since it is larger than the sum of its proper divisors (43226023).

561938117 is a wasteful number, since it uses less digits than its factorization.

561938117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43226022.

The product of its digits is 45360, while the sum is 41.

The square root of 561938117 is about 23705.2339579258. The cubic root of 561938117 is about 825.2068618703.

The spelling of 561938117 in words is "five hundred sixty-one million, nine hundred thirty-eight thousand, one hundred seventeen".