561994267 has 2 divisors, whose sum is σ = 561994268. Its totient is φ = 561994266.

The previous prime is 561994253. The next prime is 561994273. The reversal of 561994267 is 762499165.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561994267 - 2¹¹ = 561992219 is a prime.

It is a super-4 number, since 4×561994267⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 561994267.

It is not a weakly prime, because it can be changed into another prime (561994207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280997133 + 280997134.

It is an arithmetic number, because the mean of its divisors is an integer number (280997134).

Almost surely, 2^561994267 is an apocalyptic number.

561994267 is a deficient number, since it is larger than the sum of its proper divisors (1).

561994267 is an equidigital number, since it uses as much as digits as its factorization.

561994267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The square root of 561994267 is about 23706.4182659465. The cubic root of 561994267 is about 825.2343464044.

The spelling of 561994267 in words is "five hundred sixty-one million, nine hundred ninety-four thousand, two hundred sixty-seven".