3655987 has 2 divisors, whose sum is σ = 3655988. Its totient is φ = 3655986.

The previous prime is 3655957. The next prime is 3656017. The reversal of 3655987 is 7895563.

It is a balanced prime because it is at equal distance from previous prime (3655957) and next prime (3656017).

It is a cyclic number.

It is not a de Polignac number, because 3655987 - 2¹⁹ = 3131699 is a prime.

It is not a weakly prime, because it can be changed into another prime (3655907) 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, 1827993 + 1827994.

It is an arithmetic number, because the mean of its divisors is an integer number (1827994).

Almost surely, 2^3655987 is an apocalyptic number.

3655987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3655987 is an equidigital number, since it uses as much as digits as its factorization.

3655987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 226800, while the sum is 43.

The square root of 3655987 is about 1912.0635449692. The cubic root of 3655987 is about 154.0523097723.

The spelling of 3655987 in words is "three million, six hundred fifty-five thousand, nine hundred eighty-seven".