161709338 has 16 divisors (see below), whose sum is σ = 293523264. Its totient is φ = 65227200.

The previous prime is 161709319. The next prime is 161709341. The reversal of 161709338 is 833907161.

161709338 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161709338² = 52299819992796488, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339488 + ... + 339963.

It is an arithmetic number, because the mean of its divisors is an integer number (18345204).

Almost surely, 2^161709338 is an apocalyptic number.

161709338 is a deficient number, since it is larger than the sum of its proper divisors (131813926).

161709338 is a wasteful number, since it uses less digits than its factorization.

161709338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679477.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 161709338 is about 12716.4986533243. The cubic root of 161709338 is about 544.8099530951.

The spelling of 161709338 in words is "one hundred sixty-one million, seven hundred nine thousand, three hundred thirty-eight".