8389644061 has 2 divisors, whose sum is σ = 8389644062. Its totient is φ = 8389644060.

The previous prime is 8389644023. The next prime is 8389644079. The reversal of 8389644061 is 1604469838.

8389644061 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8389644025 + 36 = 91595^2 + 6^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8389644061 is a prime.

It is a super-2 number, since 2×8389644061² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8389643996 and 8389644014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8389644761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4194822030 + 4194822031.

It is an arithmetic number, because the mean of its divisors is an integer number (4194822031).

Almost surely, 2^8389644061 is an apocalyptic number.

It is an amenable number.

8389644061 is a deficient number, since it is larger than the sum of its proper divisors (1).

8389644061 is an equidigital number, since it uses as much as digits as its factorization.

8389644061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 8389644061 is about 91595.0001965173. Note that the first 3 decimals coincide. The cubic root of 8389644061 is about 2031.9569940116.

The spelling of 8389644061 in words is "eight billion, three hundred eighty-nine million, six hundred forty-four thousand, sixty-one".