4243018861 has 2 divisors, whose sum is σ = 4243018862. Its totient is φ = 4243018860.

The previous prime is 4243018853. The next prime is 4243018951. The reversal of 4243018861 is 1688103424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3481590025 + 761428836 = 59005^2 + 27594^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243018861 - 2³ = 4243018853 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4243018861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243018061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121509430 + 2121509431.

It is an arithmetic number, because the mean of its divisors is an integer number (2121509431).

Almost surely, 2^4243018861 is an apocalyptic number.

It is an amenable number.

4243018861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243018861 is an equidigital number, since it uses as much as digits as its factorization.

4243018861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 4243018861 is about 65138.4591543276. The cubic root of 4243018861 is about 1618.9185055456.

The spelling of 4243018861 in words is "four billion, two hundred forty-three million, eighteen thousand, eight hundred sixty-one".