161339 has 2 divisors, whose sum is σ = 161340. Its totient is φ = 161338.

The previous prime is 161333. The next prime is 161341. The reversal of 161339 is 933161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161339 - 2⁴ = 161323 is a prime.

Together with 161341, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (161333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80669 + 80670.

It is an arithmetic number, because the mean of its divisors is an integer number (80670).

2¹⁶¹³³⁹ is an apocalyptic number.

161339 is a deficient number, since it is larger than the sum of its proper divisors (1).

161339 is an equidigital number, since it uses as much as digits as its factorization.

161339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 486, while the sum is 23.

The square root of 161339 is about 401.6702627778. The cubic root of 161339 is about 54.4393737083.

The spelling of 161339 in words is "one hundred sixty-one thousand, three hundred thirty-nine".