8420889601 has 2 divisors, whose sum is σ = 8420889602. Its totient is φ = 8420889600.

The previous prime is 8420889541. The next prime is 8420889613. The reversal of 8420889601 is 1069880248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7025792400 + 1395097201 = 83820^2 + 37351^2 .

It is a cyclic number.

It is not a de Polignac number, because 8420889601 - 2²⁷ = 8286671873 is a prime.

It is a super-2 number, since 2×8420889601² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8420889901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210444800 + 4210444801.

It is an arithmetic number, because the mean of its divisors is an integer number (4210444801).

Almost surely, 2^8420889601 is an apocalyptic number.

It is an amenable number.

8420889601 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420889601 is an equidigital number, since it uses as much as digits as its factorization.

8420889601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 8420889601 is about 91765.4052516524. The cubic root of 8420889601 is about 2034.4764071389.

The spelling of 8420889601 in words is "eight billion, four hundred twenty million, eight hundred eighty-nine thousand, six hundred one".