161205829 has 2 divisors, whose sum is σ = 161205830. Its totient is φ = 161205828.

The previous prime is 161205791. The next prime is 161205833. The reversal of 161205829 is 928502161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 147501025 + 13704804 = 12145^2 + 3702^2 .

It is a cyclic number.

It is not a de Polignac number, because 161205829 - 2¹¹ = 161203781 is a prime.

It is equal to p_9038428 and since 161205829 and 9038428 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 161205794 and 161205803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161205029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80602914 + 80602915.

It is an arithmetic number, because the mean of its divisors is an integer number (80602915).

Almost surely, 2^161205829 is an apocalyptic number.

It is an amenable number.

161205829 is a deficient number, since it is larger than the sum of its proper divisors (1).

161205829 is an equidigital number, since it uses as much as digits as its factorization.

161205829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 161205829 is about 12696.6857486511. The cubic root of 161205829 is about 544.2439129767.

The spelling of 161205829 in words is "one hundred sixty-one million, two hundred five thousand, eight hundred twenty-nine".