561777113 has 2 divisors, whose sum is σ = 561777114. Its totient is φ = 561777112.

The previous prime is 561777091. The next prime is 561777143. The reversal of 561777113 is 311777165.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 557337664 + 4439449 = 23608^2 + 2107^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-561777113 is a prime.

It is a super-2 number, since 2×561777113² = 631187049381229538, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (561777143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 280888556 + 280888557.

It is an arithmetic number, because the mean of its divisors is an integer number (280888557).

Almost surely, 2^561777113 is an apocalyptic number.

It is an amenable number.

561777113 is a deficient number, since it is larger than the sum of its proper divisors (1).

561777113 is an equidigital number, since it uses as much as digits as its factorization.

561777113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30870, while the sum is 38.

The square root of 561777113 is about 23701.8377557522. The cubic root of 561777113 is about 825.1280428138.

The spelling of 561777113 in words is "five hundred sixty-one million, seven hundred seventy-seven thousand, one hundred thirteen".