561286667 has 2 divisors, whose sum is σ = 561286668. Its totient is φ = 561286666.

The previous prime is 561286639. The next prime is 561286673. The reversal of 561286667 is 766682165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561286667 - 2¹⁰ = 561285643 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561286367) 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 as a sum of consecutive naturals, namely, 280643333 + 280643334.

It is an arithmetic number, because the mean of its divisors is an integer number (280643334).

Almost surely, 2^561286667 is an apocalyptic number.

561286667 is a deficient number, since it is larger than the sum of its proper divisors (1).

561286667 is an equidigital number, since it uses as much as digits as its factorization.

561286667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 725760, while the sum is 47.

The square root of 561286667 is about 23691.4893368906. The cubic root of 561286667 is about 824.8878535041.

The spelling of 561286667 in words is "five hundred sixty-one million, two hundred eighty-six thousand, six hundred sixty-seven".