161608361 has 2 divisors, whose sum is σ = 161608362. Its totient is φ = 161608360.

The previous prime is 161608333. The next prime is 161608393. The reversal of 161608361 is 163806161.

161608361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (161608393) can be obtained adding 161608361 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 159264400 + 2343961 = 12620^2 + 1531^2 .

It is a cyclic number.

It is not a de Polignac number, because 161608361 - 2²⁶ = 94499497 is a prime.

It is a super-2 number, since 2×161608361² = 52234524690212642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (161608331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80804180 + 80804181.

It is an arithmetic number, because the mean of its divisors is an integer number (80804181).

Almost surely, 2^161608361 is an apocalyptic number.

It is an amenable number.

161608361 is a deficient number, since it is larger than the sum of its proper divisors (1).

161608361 is an equidigital number, since it uses as much as digits as its factorization.

161608361 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 161608361 is about 12712.5277187505. The cubic root of 161608361 is about 544.6965299825.

The spelling of 161608361 in words is "one hundred sixty-one million, six hundred eight thousand, three hundred sixty-one".