561676369 has 2 divisors, whose sum is σ = 561676370. Its totient is φ = 561676368.

The previous prime is 561676301. The next prime is 561676393. The reversal of 561676369 is 963676165.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 561121344 + 555025 = 23688^2 + 745^2 .

It is a cyclic number.

It is not a de Polignac number, because 561676369 - 2²¹ = 559579217 is a prime.

It is a super-2 number, since 2×561676369² = 630960686986048322, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is not a weakly prime, because it can be changed into another prime (561676469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280838184 + 280838185.

It is an arithmetic number, because the mean of its divisors is an integer number (280838185).

Almost surely, 2^561676369 is an apocalyptic number.

It is an amenable number.

561676369 is a deficient number, since it is larger than the sum of its proper divisors (1).

561676369 is an equidigital number, since it uses as much as digits as its factorization.

561676369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 49.

The square root of 561676369 is about 23699.7124244156. The cubic root of 561676369 is about 825.0787162112.

The spelling of 561676369 in words is "five hundred sixty-one million, six hundred seventy-six thousand, three hundred sixty-nine".