2863931561 has 2 divisors, whose sum is σ = 2863931562. Its totient is φ = 2863931560.

The previous prime is 2863931557. The next prime is 2863931591. The reversal of 2863931561 is 1651393682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2092147600 + 771783961 = 45740^2 + 27781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2863931561 - 2² = 2863931557 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2863931501) 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, 1431965780 + 1431965781.

It is an arithmetic number, because the mean of its divisors is an integer number (1431965781).

Almost surely, 2^2863931561 is an apocalyptic number.

It is an amenable number.

2863931561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2863931561 is an equidigital number, since it uses as much as digits as its factorization.

2863931561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 44.

The square root of 2863931561 is about 53515.7132158397. The cubic root of 2863931561 is about 1420.1063798171.

The spelling of 2863931561 in words is "two billion, eight hundred sixty-three million, nine hundred thirty-one thousand, five hundred sixty-one".