3870689 has 2 divisors, whose sum is σ = 3870690. Its totient is φ = 3870688.

The previous prime is 3870667. The next prime is 3870697. The reversal of 3870689 is 9860783.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3869089 + 1600 = 1967^2 + 40^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3870689 is a prime.

It is not a weakly prime, because it can be changed into another prime (3870619) 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, 1935344 + 1935345.

It is an arithmetic number, because the mean of its divisors is an integer number (1935345).

Almost surely, 2^3870689 is an apocalyptic number.

It is an amenable number.

3870689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3870689 is an equidigital number, since it uses as much as digits as its factorization.

3870689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 3870689 is about 1967.4066686885. The cubic root of 3870689 is about 157.0107637285.

The spelling of 3870689 in words is "three million, eight hundred seventy thousand, six hundred eighty-nine".