161708 has 6 divisors (see below), whose sum is σ = 282996. Its totient is φ = 80852.

The previous prime is 161683. The next prime is 161717. The reversal of 161708 is 807161.

It is a super-2 number, since 2×161708² = 52298954528, which contains 22 as substring.

It is an Ulam number.

It is a plaindrome in base 16.

It is an unprimeable number.

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, 20210 + ... + 20217.

It is an arithmetic number, because the mean of its divisors is an integer number (47166).

2¹⁶¹⁷⁰⁸ is an apocalyptic number.

It is an amenable number.

161708 is a deficient number, since it is larger than the sum of its proper divisors (121288).

161708 is a wasteful number, since it uses less digits than its factorization.

161708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40431 (or 40429 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 161708 is about 402.1293324293. The cubic root of 161708 is about 54.4808450486.

Adding to 161708 its reverse (807161), we get a palindrome (968869).

The spelling of 161708 in words is "one hundred sixty-one thousand, seven hundred eight".