3681599 has 2 divisors, whose sum is σ = 3681600. Its totient is φ = 3681598.

The previous prime is 3681593. The next prime is 3681619. The reversal of 3681599 is 9951863.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3681599 - 2²⁰ = 2633023 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3681593) 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 as a sum of consecutive naturals, namely, 1840799 + 1840800.

It is an arithmetic number, because the mean of its divisors is an integer number (1840800).

Almost surely, 2^3681599 is an apocalyptic number.

3681599 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681599 is an equidigital number, since it uses as much as digits as its factorization.

3681599 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 41.

The square root of 3681599 is about 1918.7493322474. The cubic root of 3681599 is about 154.4112105608.

The spelling of 3681599 in words is "three million, six hundred eighty-one thousand, five hundred ninety-nine".