8987161 has 2 divisors, whose sum is σ = 8987162. Its totient is φ = 8987160.

The previous prime is 8987149. The next prime is 8987183. The reversal of 8987161 is 1617898.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7946761 + 1040400 = 2819^2 + 1020^2 .

It is a cyclic number.

It is not a de Polignac number, because 8987161 - 2¹¹ = 8985113 is a prime.

8987161 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8987761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4493580 + 4493581.

It is an arithmetic number, because the mean of its divisors is an integer number (4493581).

Almost surely, 2^8987161 is an apocalyptic number.

It is an amenable number.

8987161 is a deficient number, since it is larger than the sum of its proper divisors (1).

8987161 is an equidigital number, since it uses as much as digits as its factorization.

8987161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 40.

The square root of 8987161 is about 2997.8594029741. The cubic root of 8987161 is about 207.9094233957.

The spelling of 8987161 in words is "eight million, nine hundred eighty-seven thousand, one hundred sixty-one".