161068961 has 4 divisors (see below), whose sum is σ = 164108052. Its totient is φ = 158029872.

The previous prime is 161068933. The next prime is 161068979. The reversal of 161068961 is 169860161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169860161 = 6353 ⋅26737.

It can be written as a sum of positive squares in 2 ways, for example, as 40398736 + 120670225 = 6356^2 + 10985^2 .

It is a cyclic number.

It is not a de Polignac number, because 161068961 - 2¹⁸ = 160806817 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (161068991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519466 + ... + 1519571.

It is an arithmetic number, because the mean of its divisors is an integer number (41027013).

Almost surely, 2^161068961 is an apocalyptic number.

It is an amenable number.

161068961 is a deficient number, since it is larger than the sum of its proper divisors (3039091).

161068961 is an equidigital number, since it uses as much as digits as its factorization.

161068961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3039090.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 161068961 is about 12691.2946936079. The cubic root of 161068961 is about 544.0898435540.

The spelling of 161068961 in words is "one hundred sixty-one million, sixty-eight thousand, nine hundred sixty-one".