3281687 has 2 divisors, whose sum is σ = 3281688. Its totient is φ = 3281686.

The previous prime is 3281657. The next prime is 3281689. The reversal of 3281687 is 7861823.

It is a strong prime.

It is an emirp because it is prime and its reverse (7861823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3281687 - 2⁸ = 3281431 is a prime.

Together with 3281689, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3281689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640843 + 1640844.

It is an arithmetic number, because the mean of its divisors is an integer number (1640844).

Almost surely, 2^3281687 is an apocalyptic number.

3281687 is a deficient number, since it is larger than the sum of its proper divisors (1).

3281687 is an equidigital number, since it uses as much as digits as its factorization.

3281687 is an evil number, because the sum of its binary digits is even.

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

The square root of 3281687 is about 1811.5427127175. The cubic root of 3281687 is about 148.6046453361.

The spelling of 3281687 in words is "three million, two hundred eighty-one thousand, six hundred eighty-seven".