8161684 has 12 divisors (see below), whose sum is σ = 14364000. Its totient is φ = 4057688.

The previous prime is 8161669. The next prime is 8161687. The reversal of 8161684 is 4861618.

It is a super-2 number, since 2×8161684² = 133226171431712, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161687) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 4984 + ... + 6415.

It is an arithmetic number, because the mean of its divisors is an integer number (1197000).

Almost surely, 2^8161684 is an apocalyptic number.

It is an amenable number.

8161684 is a deficient number, since it is larger than the sum of its proper divisors (6202316).

8161684 is a wasteful number, since it uses less digits than its factorization.

8161684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11582 (or 11580 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 8161684 is about 2856.8661151689. The cubic root of 8161684 is about 201.3383902457.

It can be divided in two parts, 816 and 1684, that added together give a square (2500 = 50²).

The spelling of 8161684 in words is "eight million, one hundred sixty-one thousand, six hundred eighty-four".