161309338 has 16 divisors (see below), whose sum is σ = 245379456. Its totient is φ = 79520320.

The previous prime is 161309333. The next prime is 161309359. The reversal of 161309338 is 833903161.

161309338 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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, 145695 + ... + 146797.

It is an arithmetic number, because the mean of its divisors is an integer number (15336216).

Almost surely, 2^161309338 is an apocalyptic number.

161309338 is a deficient number, since it is larger than the sum of its proper divisors (84070118).

161309338 is a wasteful number, since it uses less digits than its factorization.

161309338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2069.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 161309338 is about 12700.7613157637. The cubic root of 161309338 is about 544.3603729720.

The spelling of 161309338 in words is "one hundred sixty-one million, three hundred nine thousand, three hundred thirty-eight".