561071669 has 2 divisors, whose sum is σ = 561071670. Its totient is φ = 561071668.

The previous prime is 561071657. The next prime is 561071681. The reversal of 561071669 is 966170165.

It is a balanced prime because it is at equal distance from previous prime (561071657) and next prime (561071681).

It can be written as a sum of positive squares in only one way, i.e., 490091044 + 70980625 = 22138^2 + 8425^2 .

It is a cyclic number.

It is not a de Polignac number, because 561071669 - 2²⁴ = 544294453 is a prime.

It is a super-2 number, since 2×561071669² = 629602835508891122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (561071639) 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, 280535834 + 280535835.

It is an arithmetic number, because the mean of its divisors is an integer number (280535835).

Almost surely, 2^561071669 is an apocalyptic number.

It is an amenable number.

561071669 is a deficient number, since it is larger than the sum of its proper divisors (1).

561071669 is an equidigital number, since it uses as much as digits as its factorization.

561071669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 561071669 is about 23686.9514501128. The cubic root of 561071669 is about 824.7825170227.

The spelling of 561071669 in words is "five hundred sixty-one million, seventy-one thousand, six hundred sixty-nine".