32686681 has 4 divisors (see below), whose sum is σ = 32992272. Its totient is φ = 32381092.

The previous prime is 32686663. The next prime is 32686697. The reversal of 32686681 is 18668623.

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.

It is a cyclic number.

It is not a de Polignac number, because 32686681 - 2⁹ = 32686169 is a prime.

It is a super-2 number, since 2×32686681² = 2136838229591522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (32686081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152635 + ... + 152848.

It is an arithmetic number, because the mean of its divisors is an integer number (8248068).

Almost surely, 2^32686681 is an apocalyptic number.

It is an amenable number.

32686681 is a deficient number, since it is larger than the sum of its proper divisors (305591).

32686681 is a wasteful number, since it uses less digits than its factorization.

32686681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305590.

The product of its digits is 82944, while the sum is 40.

The square root of 32686681 is about 5717.2266878269. The cubic root of 32686681 is about 319.7350704376.

The spelling of 32686681 in words is "thirty-two million, six hundred eighty-six thousand, six hundred eighty-one".