3681287 has 2 divisors, whose sum is σ = 3681288. Its totient is φ = 3681286.

The previous prime is 3681283. The next prime is 3681319. The reversal of 3681287 is 7821863.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3681287 - 2² = 3681283 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3681283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1840643 + 1840644.

It is an arithmetic number, because the mean of its divisors is an integer number (1840644).

Almost surely, 2^3681287 is an apocalyptic number.

3681287 is a deficient number, since it is larger than the sum of its proper divisors (1).

3681287 is an equidigital number, since it uses as much as digits as its factorization.

3681287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 35.

The square root of 3681287 is about 1918.6680275650. The cubic root of 3681287 is about 154.4068485378.

The spelling of 3681287 in words is "three million, six hundred eighty-one thousand, two hundred eighty-seven".