3281987 has 2 divisors, whose sum is σ = 3281988. Its totient is φ = 3281986.

The previous prime is 3281981. The next prime is 3282029. The reversal of 3281987 is 7891823.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3281987 is a prime.

It is a Chen prime.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 3281987.

It is not a weakly prime, because it can be changed into another prime (3281981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640993 + 1640994.

It is an arithmetic number, because the mean of its divisors is an integer number (1640994).

Almost surely, 2^3281987 is an apocalyptic number.

3281987 is a deficient number, since it is larger than the sum of its proper divisors (1).

3281987 is an equidigital number, since it uses as much as digits as its factorization.

3281987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 38.

The square root of 3281987 is about 1811.6255131787. The cubic root of 3281987 is about 148.6091734985.

The spelling of 3281987 in words is "three million, two hundred eighty-one thousand, nine hundred eighty-seven".