8639161 has 2 divisors, whose sum is σ = 8639162. Its totient is φ = 8639160.

The previous prime is 8639153. The next prime is 8639171. The reversal of 8639161 is 1619368.

8639161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8590761 + 48400 = 2931^2 + 220^2 .

It is a cyclic number.

It is not a de Polignac number, because 8639161 - 2³ = 8639153 is a prime.

It is not a weakly prime, because it can be changed into another prime (8639131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4319580 + 4319581.

It is an arithmetic number, because the mean of its divisors is an integer number (4319581).

Almost surely, 2^8639161 is an apocalyptic number.

It is an amenable number.

8639161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8639161 is an equidigital number, since it uses as much as digits as its factorization.

8639161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 8639161 is about 2939.2449710768. The cubic root of 8639161 is about 205.1904713963.

The spelling of 8639161 in words is "eight million, six hundred thirty-nine thousand, one hundred sixty-one".