3655849 has 2 divisors, whose sum is σ = 3655850. Its totient is φ = 3655848.

The previous prime is 3655837. The next prime is 3655877. The reversal of 3655849 is 9485563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3459600 + 196249 = 1860^2 + 443^2 .

It is an emirp because it is prime and its reverse (9485563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3655849 - 2¹⁷ = 3524777 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3655879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1827924 + 1827925.

It is an arithmetic number, because the mean of its divisors is an integer number (1827925).

Almost surely, 2^3655849 is an apocalyptic number.

It is an amenable number.

3655849 is a deficient number, since it is larger than the sum of its proper divisors (1).

3655849 is an equidigital number, since it uses as much as digits as its factorization.

3655849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The square root of 3655849 is about 1912.0274579618. The cubic root of 3655849 is about 154.0503714461.

The spelling of 3655849 in words is "three million, six hundred fifty-five thousand, eight hundred forty-nine".