8167681 has 4 divisors (see below), whose sum is σ = 8173872. Its totient is φ = 8161492.

The previous prime is 8167673. The next prime is 8167699. The reversal of 8167681 is 1867618.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1867618 = 2 ⋅933809.

It is a cyclic number.

It is not a de Polignac number, because 8167681 - 2³ = 8167673 is a prime.

It is a super-2 number, since 2×8167681² = 133422025835522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8167681.

It is not an unprimeable number, because it can be changed into a prime (8167381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235 + ... + 4048.

It is an arithmetic number, because the mean of its divisors is an integer number (2043468).

Almost surely, 2^8167681 is an apocalyptic number.

It is an amenable number.

8167681 is a deficient number, since it is larger than the sum of its proper divisors (6191).

8167681 is a wasteful number, since it uses less digits than its factorization.

8167681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6190.

The product of its digits is 16128, while the sum is 37.

The square root of 8167681 is about 2857.9154991007. The cubic root of 8167681 is about 201.3876909668.

The spelling of 8167681 in words is "eight million, one hundred sixty-seven thousand, six hundred eighty-one".