4217900861 has 2 divisors, whose sum is σ = 4217900862. Its totient is φ = 4217900860.

The previous prime is 4217900777. The next prime is 4217900887. The reversal of 4217900861 is 1680097124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3776102500 + 441798361 = 61450^2 + 21019^2 .

It is a cyclic number.

It is not a de Polignac number, because 4217900861 - 2³⁰ = 3144159037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4217900891) 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, 2108950430 + 2108950431.

It is an arithmetic number, because the mean of its divisors is an integer number (2108950431).

Almost surely, 2^4217900861 is an apocalyptic number.

It is an amenable number.

4217900861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4217900861 is an equidigital number, since it uses as much as digits as its factorization.

4217900861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 4217900861 is about 64945.3682798088. The cubic root of 4217900861 is about 1615.7176005004.

Adding to 4217900861 its reverse (1680097124), we get a palindrome (5897997985).

The spelling of 4217900861 in words is "four billion, two hundred seventeen million, nine hundred thousand, eight hundred sixty-one".