161309339 has 8 divisors (see below), whose sum is σ = 168149520. Its totient is φ = 154554400.

The previous prime is 161309333. The next prime is 161309359. The reversal of 161309339 is 933903161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161309339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 161309299 and 161309308.

It is not an unprimeable number, because it can be changed into a prime (161309333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17432 + ... + 25029.

It is an arithmetic number, because the mean of its divisors is an integer number (21018690).

Almost surely, 2^161309339 is an apocalyptic number.

161309339 is a deficient number, since it is larger than the sum of its proper divisors (6840181).

161309339 is a wasteful number, since it uses less digits than its factorization.

161309339 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42621.

The product of its (nonzero) digits is 13122, while the sum is 35.

The square root of 161309339 is about 12700.7613551314. The cubic root of 161309339 is about 544.3603740969.

The spelling of 161309339 in words is "one hundred sixty-one million, three hundred nine thousand, three hundred thirty-nine".