32805681 has 4 divisors (see below), whose sum is σ = 43740912. Its totient is φ = 21870452.

The previous prime is 32805673. The next prime is 32805683. The reversal of 32805681 is 18650823.

It is a happy number.

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 32805681 - 2³ = 32805673 is a prime.

It is a super-2 number, since 2×32805681² = 2152425411747522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (32805683) 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, 5467611 + ... + 5467616.

It is an arithmetic number, because the mean of its divisors is an integer number (10935228).

Almost surely, 2^32805681 is an apocalyptic number.

It is an amenable number.

32805681 is a deficient number, since it is larger than the sum of its proper divisors (10935231).

32805681 is a wasteful number, since it uses less digits than its factorization.

32805681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10935230.

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 32805681 is about 5727.6243766504. The cubic root of 32805681 is about 320.1226125185.

The spelling of 32805681 in words is "thirty-two million, eight hundred five thousand, six hundred eighty-one".