561116867 has 2 divisors, whose sum is σ = 561116868. Its totient is φ = 561116866.

The previous prime is 561116789. The next prime is 561116869. The reversal of 561116867 is 768611165.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 561116867 - 2¹² = 561112771 is a prime.

Together with 561116869, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561116869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280558433 + 280558434.

It is an arithmetic number, because the mean of its divisors is an integer number (280558434).

Almost surely, 2^561116867 is an apocalyptic number.

561116867 is a deficient number, since it is larger than the sum of its proper divisors (1).

561116867 is an equidigital number, since it uses as much as digits as its factorization.

561116867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 41.

The square root of 561116867 is about 23687.9055004870. The cubic root of 561116867 is about 824.8046636403.

The spelling of 561116867 in words is "five hundred sixty-one million, one hundred sixteen thousand, eight hundred sixty-seven".