3691841 has 2 divisors, whose sum is σ = 3691842. Its totient is φ = 3691840.

The previous prime is 3691819. The next prime is 3691843. The reversal of 3691841 is 1481963.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3690241 + 1600 = 1921^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 3691841 - 2¹⁸ = 3429697 is a prime.

Together with 3691843, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 3691798 and 3691807.

It is not a weakly prime, because it can be changed into another prime (3691843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1845920 + 1845921.

It is an arithmetic number, because the mean of its divisors is an integer number (1845921).

Almost surely, 2^3691841 is an apocalyptic number.

It is an amenable number.

3691841 is a deficient number, since it is larger than the sum of its proper divisors (1).

3691841 is an equidigital number, since it uses as much as digits as its factorization.

3691841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 32.

The square root of 3691841 is about 1921.4164046349. The cubic root of 3691841 is about 154.5542657344.

The spelling of 3691841 in words is "three million, six hundred ninety-one thousand, eight hundred forty-one".