161205833 has 2 divisors, whose sum is σ = 161205834. Its totient is φ = 161205832.

The previous prime is 161205829. The next prime is 161205841. The reversal of 161205833 is 338502161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160478224 + 727609 = 12668^2 + 853^2 .

It is a cyclic number.

It is not a de Polignac number, because 161205833 - 2² = 161205829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161205796 and 161205805.

It is not a weakly prime, because it can be changed into another prime (161205853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80602916 + 80602917.

It is an arithmetic number, because the mean of its divisors is an integer number (80602917).

Almost surely, 2^161205833 is an apocalyptic number.

It is an amenable number.

161205833 is a deficient number, since it is larger than the sum of its proper divisors (1).

161205833 is an equidigital number, since it uses as much as digits as its factorization.

161205833 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 161205833 is about 12696.6859061725. The cubic root of 161205833 is about 544.2439174782.

Adding to 161205833 its reverse (338502161), we get a palindrome (499707994).

The spelling of 161205833 in words is "one hundred sixty-one million, two hundred five thousand, eight hundred thirty-three".