161883593 has 2 divisors, whose sum is σ = 161883594. Its totient is φ = 161883592.

The previous prime is 161883587. The next prime is 161883599. The reversal of 161883593 is 395388161.

It is a balanced prime because it is at equal distance from previous prime (161883587) and next prime (161883599).

It can be written as a sum of positive squares in only one way, i.e., 131721529 + 30162064 = 11477^2 + 5492^2 .

It is a cyclic number.

It is not a de Polignac number, because 161883593 - 2⁴ = 161883577 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (161883599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80941796 + 80941797.

It is an arithmetic number, because the mean of its divisors is an integer number (80941797).

Almost surely, 2^161883593 is an apocalyptic number.

It is an amenable number.

161883593 is a deficient number, since it is larger than the sum of its proper divisors (1).

161883593 is an equidigital number, since it uses as much as digits as its factorization.

161883593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 44.

The square root of 161883593 is about 12723.3483407474. The cubic root of 161883593 is about 545.0055752312.

The spelling of 161883593 in words is "one hundred sixty-one million, eight hundred eighty-three thousand, five hundred ninety-three".