3581000861 has 2 divisors, whose sum is σ = 3581000862. Its totient is φ = 3581000860.

The previous prime is 3581000831. The next prime is 3581000869. The reversal of 3581000861 is 1680001853.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3433256836 + 147744025 = 58594^2 + 12155^2 .

It is a cyclic number.

It is not a de Polignac number, because 3581000861 - 2³⁰ = 2507259037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3581000869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1790500430 + 1790500431.

It is an arithmetic number, because the mean of its divisors is an integer number (1790500431).

Almost surely, 2^3581000861 is an apocalyptic number.

It is an amenable number.

3581000861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3581000861 is an equidigital number, since it uses as much as digits as its factorization.

3581000861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 3581000861 is about 59841.4643955176. The cubic root of 3581000861 is about 1529.9179560716.

The spelling of 3581000861 in words is "three billion, five hundred eighty-one million, eight hundred sixty-one", and thus it is an aban number.