161147081 has 2 divisors, whose sum is σ = 161147082. Its totient is φ = 161147080.

The previous prime is 161147069. The next prime is 161147093. The reversal of 161147081 is 180741161.

161147081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (161147069) and next prime (161147093).

It can be written as a sum of positive squares in only one way, i.e., 113316025 + 47831056 = 10645^2 + 6916^2 .

It is a cyclic number.

It is not a de Polignac number, because 161147081 - 2¹⁰ = 161146057 is a prime.

It is a super-2 number, since 2×161147081² = 51936763429641122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161147381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80573540 + 80573541.

It is an arithmetic number, because the mean of its divisors is an integer number (80573541).

Almost surely, 2^161147081 is an apocalyptic number.

It is an amenable number.

161147081 is a deficient number, since it is larger than the sum of its proper divisors (1).

161147081 is an equidigital number, since it uses as much as digits as its factorization.

161147081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 161147081 is about 12694.3720207027. The cubic root of 161147081 is about 544.1777922780.

The spelling of 161147081 in words is "one hundred sixty-one million, one hundred forty-seven thousand, eighty-one".