8420889541 has 2 divisors, whose sum is σ = 8420889542. Its totient is φ = 8420889540.

The previous prime is 8420889487. The next prime is 8420889601. The reversal of 8420889541 is 1459880248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5051087041 + 3369802500 = 71071^2 + 58050^2 .

It is a cyclic number.

It is not a de Polignac number, because 8420889541 - 2¹³ = 8420881349 is a prime.

It is a super-2 number, since 2×8420889541² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8420889341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210444770 + 4210444771.

It is an arithmetic number, because the mean of its divisors is an integer number (4210444771).

Almost surely, 2^8420889541 is an apocalyptic number.

It is an amenable number.

8420889541 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420889541 is an equidigital number, since it uses as much as digits as its factorization.

8420889541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 737280, while the sum is 49.

The square root of 8420889541 is about 91765.4049247318. The cubic root of 8420889541 is about 2034.4764023069.

The spelling of 8420889541 in words is "eight billion, four hundred twenty million, eight hundred eighty-nine thousand, five hundred forty-one".