1009109161 has 2 divisors, whose sum is σ = 1009109162. Its totient is φ = 1009109160.

The previous prime is 1009109159. The next prime is 1009109207. The reversal of 1009109161 is 1619019001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 896643136 + 112466025 = 29944^2 + 10605^2 .

It is an emirp because it is prime and its reverse (1619019001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1009109161 - 2¹ = 1009109159 is a prime.

Together with 1009109159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1009109141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504554580 + 504554581.

It is an arithmetic number, because the mean of its divisors is an integer number (504554581).

Almost surely, 2^1009109161 is an apocalyptic number.

It is an amenable number.

1009109161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009109161 is an equidigital number, since it uses as much as digits as its factorization.

1009109161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 28.

The square root of 1009109161 is about 31766.4785741196. The cubic root of 1009109161 is about 1003.0272137299.

The spelling of 1009109161 in words is "one billion, nine million, one hundred nine thousand, one hundred sixty-one".