161708884 has 6 divisors (see below), whose sum is σ = 282990554. Its totient is φ = 80854440.

The previous prime is 161708881. The next prime is 161708887. The reversal of 161708884 is 488807161.

It is an interprime number because it is at equal distance from previous prime (161708881) and next prime (161708887).

It can be written as a sum of positive squares in only one way, i.e., 126067984 + 35640900 = 11228^2 + 5970^2 .

It is a super-2 number, since 2×161708884² = 52299526329050912, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161708884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161708881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20213607 + ... + 20213614.

Almost surely, 2^161708884 is an apocalyptic number.

It is an amenable number.

161708884 is a deficient number, since it is larger than the sum of its proper divisors (121281670).

161708884 is a wasteful number, since it uses less digits than its factorization.

161708884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40427225 (or 40427223 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 43.

The square root of 161708884 is about 12716.4808024862. The cubic root of 161708884 is about 544.8094432422.

The spelling of 161708884 in words is "one hundred sixty-one million, seven hundred eight thousand, eight hundred eighty-four".