3688081 has 2 divisors, whose sum is σ = 3688082. Its totient is φ = 3688080.

The previous prime is 3688063. The next prime is 3688093. The reversal of 3688081 is 1808863.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3686400 + 1681 = 1920^2 + 41^2 .

It is a cyclic number.

It is not a de Polignac number, because 3688081 - 2¹⁹ = 3163793 is a prime.

It is a super-2 number, since 2×3688081² = 27203882925122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3688001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1844040 + 1844041.

It is an arithmetic number, because the mean of its divisors is an integer number (1844041).

Almost surely, 2^3688081 is an apocalyptic number.

It is an amenable number.

3688081 is a deficient number, since it is larger than the sum of its proper divisors (1).

3688081 is an equidigital number, since it uses as much as digits as its factorization.

3688081 is an odious number, because the sum of its binary digits is odd.

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

The square root of 3688081 is about 1920.4377105233. The cubic root of 3688081 is about 154.5017786929.

The spelling of 3688081 in words is "three million, six hundred eighty-eight thousand, eighty-one".